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分类归档 Steel plate

ASTM A335 P5

The range of ASTM A335 P5 pipe sizes that may be examined by each method shall be subjected to the limitations in the scope of the respective practice.

Spec.GradeO.D
mm
W.T
mm
Length
mm
Qty
pcs
ASTM A335P52531200012
ASTM A335P5323 16
GB99481Cr5Mo485820011
ASTM A335P548.35.086000-1200083
MAL 0371Cr5Mo60.356000-1200048
ASTM A335P560.35.6 3
MAL 0371Cr5Mo7666000-120002
GB99481Cr5Mo898100009
ASTM A335P5101.65.74104005
ASTM A335P5101.65.746000-120004
ASTM A335P510286000-120003
ASTM A335P5114.361180012
ASTM A335P5114.366000-120005
GB99481Cr5Mo11476000-120009
GB99481Cr5Mo1148800016
GB99481Cr5Mo114.38.566000-1200042
ASTM A335P51526.5110004
ASTM A335P51526.56000-120002
GB99481Cr5Mo15286000-120005
JIS G3467STFA25152.4101200053
ASTM A335P51598 2
ASTM A335P51598  
GB99481CR5MO16866000-1200013
ASTM A335P516876000-1200013
ASTM A335P5168.37.111200044
ASTM A335P5168.37.116000-120007
ASTM A335P5168.37.1128/259.85,20/166.2858
ASTM A335P5168.37.111200057
GB99481CR5MO1689.5 28
ASTM A335P5168.310.97  
ASTM A335P5168.314.27 37
ASTM A335P5168.316 22
ASTM A335P5168.32450002
ASTM A335P5219.18  
ASTM A335P5219.18.18600024
ASTM A335P5219.18.181200037
ASTM A335P5219.110960035
GB99481CR5MO21910 24
ASTM A335P5219.112 10
ASTM A335P5219.114  
ASTM A335P5219.116  
ASTM A335P5219.118  
ASTM A335P5219.120 11
ASTM A335P5219.124  
ASTM A335P52739 3
ASTM A335P5273.19.27 14
ASTM A335P5273.110 15
ASTM A335P5273.115.09 9
GB99481CR5MO27318 2
ASTM A335P5323.910.311200010
ASTM A335P532512 2
ASTM A335P5355.627.7980004
ASTM A335P537715 1
ASTM A335P537716 11
ASTM A335P540614 3
ASTM A335P5406.426.1970005
ASTM A335P5406.430.9660006
ASTM A335P547314 2
ASTM A335P5609.616 1
ASTM A335P591432 1

Seamless steel tubes for high pressure boiler

Seamless steel tubes for high pressure boiler is a kind of boiler tube, which belongs to the seamless steel tube category. The manufacturing method is the same as the seamless pipe, but there are strict requirements on the steel type used for manufacturing the steel pipe. Seamless steel tubes for high pressure boiler are often under high temperature and pressure when used. The tubes will be oxidized and corroded under the action of high temperature flue gas and water vapor. It is required that the steel pipe has high durability, high resistance to oxidation and corrosion, and good structural stability. High-pressure boiler seamless tubes are mainly used to manufacture superheater tubes, reheater tubes, air ducts, and main steam tubes for high-pressure and ultra-high-pressure boilers.

Standard: Chinese GB5310

Main steel pipe grade: 20G, 25MnG, 15MoG, 15CrMoG, 12Cr2MoG, 12Cr1MoVG ( Other grade is also negotiable. )

Chemical Compositon:

GradeCMnSiVCrMoP.S
20G0.17-0.24035-0.650.17-0.37///≤ 0.030
25MnG0.22-0.300.70-1.000.17-0.37///≤ 0.030
15MoG0.12-0.200.40-0.800.17-0.37//0.25-0.35≤ 0.030
15CrMoG0.12-0.180.40-0.700.17-0.37/0.80-1.100.40-0.55≤ 0.030
12Cr2MoG0.08-0.150.40-0.70≤ 0.50/2.00-2.500.90-1.20≤ 0.030
12Cr1MoVG0.08-0.150.40-0.700.17-0.370.15-0.300.90-1.200.25-0.35≤ 0.030

Mechanical Propertise:

GradeTensile Strength(Mpa)Yield Strength(Mpa)Elongation(%)
20G410-550≥ 245≥ 24
25MnG≥ 415≥ 240≥ 22
15MoG450-600≥ 270≥ 22
15CrMoG440-640≥ 235≥ 21
12Cr2MoG450-600≥ 280≥ 20
12Cr1MoVG470-640≥ 255≥ 21

Application : It is used for heating-pipelines,containers,coal-saving devices superheaters and reheaters of high pressure boilers (P>9.8Mpa, 450 ℃ <T< 650 ℃ )

Specifications and appearance quality: GB5310-95 “Seamless Steel Tubes for High Pressure Boilers” The outer diameter of hot-rolled tubes is 22 to 530mm, and the wall thickness ranges from 20 to 70mm. Cold-drawn (cold-rolled) pipe has an outer diameter of 10 to 108 mm and a wall thickness of 2.0 to 13.0 mm.

EN10028 steel plates

EN 10028 steel grade specification is for flat products made of steels for pressure weldable fine grain normalized steel.

Quenched and tempered boiler steel plate P355Q under steel standard EN 10028-6 which is mainly used for building boilers and pressure vessels.In the steel standard EN 10028-6,steel grade P355Q,P460Q,P500Q,P690Q means the minus 20 centi degree impacting test,P355QH,P460QH,P500QH,P690QH means the minus 20 centi degree,P355QL1,P460QL1,P500QL1,P690QL1 means minus 40 centi degree,P355QL2,P460QL2,P500QL2,P690QL2 means doing minus 60 low temperature impacting test when rolling.

Technical Requirements & Additional Services:

  • High tension test
  • Low temperature impacting test
  • Simulated post-welded heat treatment (PWHT)
  • Ultrasonic test under EN 10160,ASTM A435,A577,A578
  • Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2
  • Shot blasting and Painting,Cutting and welding as per end user’s demands

EN 10028-6 is the European steel standard which includes flat products made of steels for pressure purposes – part 6: weldable fine grain steels, quenched and tempered.

Scope:

This European Standard EN 10028-6 specifies the requirements for flat products for pressure equipments made of quenched and tempered steels as specified in Table 1. The requirements in EN 10028-1:2007 + A1:2009 also apply. NOTE OnceThis European Standard is published in the EU Official Journal (OJEU) under Directive 97/23/EC; presumption of conformity to the Essential Safety Requirements (ESRs) of Directive 97/23/EC is limited to technical data of materials inThis European Standard (Part 1 andThis Part 6 of the series) and does not presume adequacy of the material to a specific item of equipment. Consequently; the assessment of the technical data stated inThis material standard against the design requirements of this specific item of equipment to verify that the ESRs of Directive 97/23/EC are satisfied; needs to be done.

More information about the EN 10028-6 standard:

  • The full designation of the standard is “Flat products made of steels for pressure purposes”.
  • The standard covers non-alloy and alloy steels with specified elevated temperature properties.
  • Also covered are chrome moly material grades with varying quantities of chromium and molybdenum.

Mechnical property for P355QL1 pressure vessel steel:

Thickness (mm)
P355QL1≤ 50> 50 ≤ 100> 100
Yield strength (≥Mpa)355335315
≤ 100> 100
Tensile strength (Mpa)490-630450-590

Chemical composition for P355QL1 pressure vessel steel (Heat Analysis Max%)

Main chemical elements composition of P355QL1
CSiMnPSBNCr
0.160.401.500.0200.0100.0050.0150.30
CuMoNbNiTiVZr
0.300.250.050.500.030.060.05

EN 10028-6 is the European steel standard which includes flat products made of steels for pressure purposes – part 6: weldable fine grain steels, quenched and tempered.

ASTM A335 P91 for High Temperature Service

ASTM A335 Grade P91 pipe is premium grade pipe applied for high pressure boiler. And P91 pipe is ideal when it comes to bending, flanging or when it is used in similar operations such as welding. The material of steel should stick to the composition of chemicals, tensile property and the requirements of hardness.

ASTM A335 P91 alloy steel pipe and high pressure boiler pipes are the two variants available and the range is dependent based on the size, which is solely based on the usage. The length of the pipe will be subject to hydrostatic test and there will also be a non-destructive examination based on the specifications.

ASTM A335 P91 high pressure semaless boiler pipe, The range of ASTM A335 P91 seamless alloy steel pipe sizes that may be examined by each method shall be subjected to the limitations in the scope of the respective practice.

Download ASTM A335 P91 Alloy pipe
  • Outer Dimensions: 19.05mm – 114.3mm
  • Wall Thickness: 2.0mm – 14 mm
  • Length: max 16000mm

Steel grade: ASTM A335 P91

ASTM A335 P91 alloy steel pipe

Each length of pipe shall be subjected to the hydrostatic test. Also, each pipe shall be examined by a non-destructive examination method in accordance to the required practices.

The different mechanical test requirements for pipes, namely, transverse or longitudinal tension test, flattening test, and hardness or bend test are presented.Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.

A335 P91 alloy pipes
Packing:

Bare packing/bundle packing/crate packing/wooden protection at the both sides of tubes and suitably protected for sea-worthly delivery or as requested.

Inspection and Test:

Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test,No-destructive Test, Hydrostatic Test.

Surface treatment:

Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.
Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.

ASTM A335 P91 Chemical Compositions(%)
CompositionsData
UNS Designa-tionK91560
Carbon(max.)0.08-0.12
Manganese0.30-0.60
Phosphorus(max.)0.025
Silicon(max.)0.50
Chromium4.00-6.00
Molybdenum0.45-0.65
Other Elements
Mechanical properties for ASTM A335 P91
PropertiesData
Tensile strength, min, (MPa)415 Mpa
Yield strength, min, (MPa)205 Mpa
Elongation, min, (%), L/T30/20
Material & Manufacture

Pipe may be either hot finished or cold drawn with the finishing heat treatment noted below.

Heat Treatment
  • A / N+T
  • N+T / Q+T
  • N+T
Mechanical Tests Specified
  • Transverse or Longitudinal Tension Test and Flattening Test, Hardness Test, or Bend Test
  • For material heat treated in a batch-type furnace, tests shall be made on 5% of the pipe from each treated lot. For small lots, at least one pipe shall be tested.
  • For material heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5% of the lot, but in no case less than 2 pipe.
Notes for Bend Test:
  • For pipe whose diameter exceeds NPS 25 and whose diameter to wall thickness ratio is 7.0 or less shall be subjected to the bend test instead of the flattening test.
  • Other pipe whose diameter equals or exceeds NPS 10 may be given the bend test in place of the flattening test subject to the approval of the purchaser.
  • The bend test specimens shall be bent at room temperature through 180 without cracking on the outside of the bent portion.

Advantages of P91

A335 P91 alloy pipes

SA 335 P91 or SA 213 T91 is the ultimate Ferrite Alloy steel that meets the extensive condition. Normally, the materials are used in many numbers of successful power plant service. Metal is also called as the 9 Cr 1 Mo steel with more composition. T22 or P22 grade is its predecessor but the Grade 91 mainly exhibits with the higher strength of temperature in the range of about 600 °C. Oxidation temperature mainly limits to higher features so it also effectively allows power plant designers to extensively engineer the components. In fact, it also effectively allows power plant designers for easily engineering the components with superheater coils, steam piping and headers as it mainly has less thickness. The metal also contributes higher thermal fatigue life that is ten times stronger when compared to other metals in much excellence. It also effectively allows to increase operating temperature at the higher level and increased efficiency at the power plant.

Normally, Alloy steel is not tolerant based on variations in the microstructure when compared to the P22 grade and other grades. Alloy steel is available in the difference that mainly contains the amount of carbon and iron. These are like the carbon steel along with it has other elements. Elements used in the Alloy steel mainly add manganese, silicon, chromium, vanadium, boron, and nickel. With more number of value composition about elements that are presented based on different ranges with more properties in the alloy steel. Normally, usage or application of alloy steel is to acquire the well-determined physical properties of the steel. The alloy steel falls into 2 types that include low alloy steels and high alloy steels. The Alloy steel is considered as the high alloy properties with the amount of the included elements belongs to the level of 8%. When these elements are combined with the range that is perforated in the below 8% value then it is called as low alloy steel. Low alloy steel is only used in most of the factories.

Alloy Steel P91 is manufactured based on precision and strict industry standard that mainly follows the heat treatment requirements. It is also reported that the failures of base materials are completely based on the different stages of usage. Alloy Steel P91 mainly used for different application with the extensive precision manufactured that are also complete reinstate with the microstructure to the high excellence. Alloy Steel P91 has properties much lower when compared to the predecessor P22. The effect of variation based on treatment on properties would be quite easier to analyze but it is not in the suitable for P91. Fabrication with construction phase mainly affects microstructure with reversed by precise heat treatment. In fact, it also brings microstructure back to original size and shape to the excellence. Alloy Steel P91 is decided based on tanker linings with complete prevalent consumption protection with high return quality and it also efficiently adds structures. With the variety of welding consumables along other national specifications enabled, P91 materials are widely used across for different aspects.


ASTM A335 P91 pipe Stocks

The alloying elements in ASTM A335 P91 Alloy steel Seamless Pipes tend to make either compounds or carbides or solid solutions.

ASTM A335 P91 is the part of ASTM A335, The pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding. The steel material shall conform to chemical composition, tensile property, and hardness requirements.

The range of ASTM A335 P91 pipe sizes that may be examined by each method shall be subjected to the limitations in the scope of the respective practice.

Rare earth alloy wear-resistant high chromium cast iron pipes

Rare earth alloy wear-resistant high chromium cast iron pipes have excellent wear resistance, high temperature resistance and corrosion resistance.

We are manufacturer of Rare earth alloy wear-resistant high chromium cast iron pipes and supply high quality Rare earth alloy wear-resistant high chromium cast iron pipes in both large and small quantities worldwide and offer you the best prices in the market.

Rare earth alloy wear-resistant high chromium cast iron pipes
Features of Rare earth alloy wear-resistant high chromium cast iron pipes:

Pressure is high. Applicable to any pressure level. Use in conjunction with the outer lining tight, using a special process to form a connection between the composite layer solution to ensure the reliability of operation, has good resistance to mechanical shock, thermal shock resistance, easy installation and connection, any cutting, welding.

Rare earth alloy wear-resistant high chromium cast iron pipes

Rare earth alloy wear-resistant high chromium cast iron pipe under the same conditions as compared with the high manganese steel materials, the unit is a high-manganese steel wear about 1/3, life is more than three times as high manganese steel. Bends and branches seamless steel pipe segment with supporting the use, manufacture applicable irregular pipelines, cutting, welding easy maintenance.

Applications:

Thermal power plant coal transportation systems, dry ash conveying pipe

Stone in the coal power plant systems

  • coal cleaning plant 
  • Other powder pneumatic conveying system 
  • Hydraulic transmission systems and larger particle size slag slurry transportation

Key performance indicators:

ItemData
Tensile strength:≥700MPa 
Impact toughness:αkJ/ c㎡≥8 
Hardness:HRC≥38 
Grade:ZG40CrNiMoMnSiRe 

Rare earth alloy wear-resistant high chromium cast iron pipes have excellent wear resistance, high temperature resistance and corrosion resistance.

Rectangular Hollow Section

Rectangular tubes are formed from coils and then ran through a series of dies. They are are welded from the inside to form their shape. Rectangular tubes are generally used for maintenance and structural purposes.

Rectangular steel tube comes in different sizes, specifications and wall thicknesses.

Its uniformity makes it predictable to use and visually appealing. It has a high weight-to-strength ratio.

ASTM A500 Gr.B galvanized rectangular steel pipe
It’s easy to bend, and because square steel tubing is inexpensive, it’s cost-effective- even for large projects.

We are manufacturing and exporting Rectangular Hollow Sections, Rectangular Hollow Steel Sections and Rectangular Hollow Section Tubes as per customer’s requirement with anti rust oil coating from inside & outside of the tubes to ensure safe delivery to end customers.

Rectangular Tube is commonly available in Aluminium, Stainless Steel, Black Steel and Bright Steel. It can be purchased at any Metal Supermarkets location. It can be cut to your exact specifications.

Rare earth alloy wear-resistant pipe bending

We are manufacturer of Rare earth alloy wear-resistant pipe bending and supply high quality Rare earth alloy wear-resistant pipe bending in both large and small quantities worldwide and offer you the best prices in the market.

Customerised pipe bending

Features of Rare earth alloy wear-resistant pipe bending:

The late eighty`s, American technology of rare eath wear resistant steel was introduced into our country. The relevant experts researched and made many experiments. The rare-earth wear-resistant steel had occupied the main position.Rare-earth wear-resistant steel is based on 40 steel. Cr, Ni, Si, Mo, Mn, Re elements are mixed in 40 steel forming low alloy steel which carbon content is 0.35~ 0.45%.

Performance indicators:

  • Grade: ZG40CrNiMoMnSiRe
  • Hardness: HRC ≥ 40
  • Impact toughness: ≥ 14J/cm2
  • Tensile strength: ≥ 700MPa

Packing:

  • Packed in wooden crates, wrapped in plastic, and suitably protected for sea-worthly delivery or as requested.
  • Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles.

Uses:

Rare high-strength low-alloy heat-resistant, wear-resistant steel parts for the power plant boiler systems in coal, powder, ash slagging pipeline.

Rare earth metal wear resistant pipe

Rare earth metal wear resistant pipe and Bend are cast with mold vanishing vacuum suction casting cladding process. Outer of straight pipe is common steel pipe, cladding realized by forming high chromium lining via centrifugal forming technique.

Rare earth alloy wear-resistant pipe Material composition table

No.GradeChemical component
CMnSiCrNiMoWVNbCuReNSP
1ZGCr20Mo3Ni3Re2.50/
3.0
1.50/
2.0
0.80/
1.20
18.0/
23.0
2.50/
3.0
   1.20/
1.50
 ≤0.06≤0.06
2ZGCr28Mo3Ni3Re2.80/
3.30
1.50/
2.0
1.80/
1.20
25.0/
300
2.80/
3.30
   1.80/
2.30
 ≤0.06≤0.06
3ZGCr15Mo3Re2.60/
3.20
1.20/
1.60
1.0/
1.50
12.0/
16.0
2.50/
3.0
   1080/
1.20
 ≤0.04≤0.05
4ZGCr25Ni4Si2Re0.35/
0.45
0.80/
1.20
1.20/
1.60
23.0/
26.0
3.50/
4.50
     ≤0.035≤0.045
5ZGCr15Mo2Re1.80/
2.20
0.80/
1.20
1.0/
1.50
14.0/
18.0
2.0/
2.50
   0.80/
1.20
 ≤0.04≤0.05
6ZG40CrMnMoNiSiRe0.40/
0.50
1.20/
1.60
1.50/
2.0
1.10/
1.60
1.0/
1.50
   ≤0.035≤0.04
7ZG40Cr5Ni3MoVWRe0.35/
0.45
0.80/
1.2
1.20/
1.60
23.0/
26.0
2.50/
3.50
   ≤0.045≤0.055
8ZG50Cr18Ni4MoVWCuRe0.45/
0.60
1.0/
1.40
1.50/
2.0
16.0/
20.0
3.50/
5.0
 0.40/
0.60
 ≤0.35≤0.35
9ZGCr25Ni2Mo2WVCuRe0.40/
0.60
0.80/
1.20
1.20/
1.60
23.0/
26.0
1.50/
2.50
 0.20/
0.40
 ≤0.035≤0.035
10ZG40Cr25Ni6MoWVCuRe0.35/
0.45
1.2/
1.60
1.50/
2.0
23.0/
26.0
5.0/
7.0
 ≤0.35≤0.045
11ZG90CrMn13MoSiVRe0.40/
1.30
11.0/
14.0
0.30/
0.80
       ≤0.04≤0.04
12ZGCrMu10MoSiVRe1.0/
1.20
8.0/
11.0
0.30/
0.80
       ≤0.04≤0.04
13ZGW5Cr4Re2.50/
3.50
1.5/
1.0
0.50/
1.0
35.0/
4.50
      ≤0.10≤0.15
14ZGCr25MoRe2.30/
3.0
0.50/
0.90
0.30/
0.60
23.0/
28.0
      ≤0.06≤0.10
15ZGCr15MoRe3.0/
3.50
≤1.00.15/
1.0
15.0/
18.60
 2.80/
3.30
     ≤0.06≤0.10
16ZG30CrMnSi0.27/
0.33
1.30/
1.50
1.20/
1.50
      ≤0.03≤0.04
17ZG40CrNiRe0.28/
0.43
1.10/
1.40
0.80/
1.0
      ≤0.06≤0.10
18ZG33Cr13Ni4Re0.30/
0.35
≤0.80≤0.6012.0/
14.0
4.0/
4.50
     ≤0.06≤0.10
19ZG40CrSiN0.35/
0.45
1.0/
1.50
1.50/
2.0
       ≤0.04≤0.08

Note: All content in this article is for reference only.

  • The wear and tear of rare earth alloy is a phenomenon of material loss caused by relative motion between objects.
  • Rare earth wear-resistant alloy steel tube wear-resistant materials can resist wear and prolong the life of the product.
  • Mainly divided into single metal pipe and composite pipe.
  • According to the shape can be divided into straight pipe, elbow, tee, four-pass, reducer, Fangyuan section and other special-shaped tubes.

Rare Earth Alloy Wear-resisting Casting Flanged Pipe

Performance indicators:

  • Grade: ZG40CrNiMoMnSiRe
  • Hardness: HRC ≥ 40
  • Impact toughness: ≥ 14J/cm2
  • Tensile strength: ≥ 700MPa

Surface Quality requirements:

the internal and external surface of the pipeline should be smooth and smooth, no burrs, burrs, sticky sand, more meat or lack of meat, no cracks, loose, stomata or bubbles.


What are the materials and uses of the wear-resistant pipe?

According to the different wear conditions, the wear-resistant straight pipe has different material selection.

The function of each material is different, at present there are mainly 4 kinds of materials, including ceramic composite pipe widely used. Materials should be selected according to specific conditions.

According to the pipe material, the wear-resistant tube is divided into the following categories:

SHS ceramic wear-resistant tube (ceramic composite pipe), used in coal washery, thermal power plant ash, steel mills, cement, etc. (the tube is widely used).

  1. Cceramic SMD wear-resistant pipe, used for conveying fly ash.
  2. Surfacing welding wear-resistant pipe, used for sea sand conveying.
  3. Bimetal high chromium alloy wear-resistant pipe, used for power plant pulverized coal.
  4. Ceramic ring wear-resistant tube for the delivery of silica fume.
  5. Rubber wear-resistant pipe, used in concentrator.
  6. Polyethylene wear-resistant pipe for pulp conveying.
  7. Cast-stone wear-resistant pipe for pulverized coal conveying.
  8. Ni-w alloy wear-resistant tube for high-temperature wear and tear transport.
  9. Liner plastic wear-resistant pipe, used for chemical water.

What is the material of the rare earth wear-resistant alloy pipe

The wear and tear of rare earth alloy is a phenomenon of material loss caused by relative motion between objects. Rare earth wear-resistant alloy steel tube wear-resistant materials can resist wear and prolong the life of the product. Mainly divided into single metal pipe and composite pipe. According to the shape can be divided into straight pipe, elbow, tee, four-pass, reducer, Fangyuan section and other special-shaped tubes.

Surface Quality requirements: the internal and external surface of the pipeline should be smooth and smooth, no burrs, burrs, sticky sand, more meat or lack of meat, no cracks, loose, stomata or bubbles.

Rare earth wear-resistant pipe, is in the area of serious wear, such as elbow, reducer, suction nozzle, such as the use of the model as a whole casting, especially in the outside of the elbow wear particularly significant parts, the external diameter of the method to change the center of the design, so that the wear serious parts of the local thickening, but also according to various requirements, Make a variety of irregular shaped pipe fittings to meet the design requirements, straight pipe is centrifugal casting. Second, the rare earth wear-resistant alloy containing CR, Ni, Mo, W, V, Cu and many other alloying elements, it not only has a high hardness, but also has a certain mechanical properties, at room temperature with good welding performance, and has the possibility of cutting and on-site openings, but also has a certain corrosion resistance. In the actual use of the process, whether it is in the steel slag pipe, or in the coal preparation plant, such as the use of washing pipes have achieved very good results, in the same conditions compared with high manganese steel, the unit wear is about 1/5 of the higher manganese steel, the service life is high manganese steel 4-5 times, elbow and branch pipe can be used with seamless pipe fittings, installation, maintenance more convenient.

High strength and low alloy rare earth heat-resisting and wear-resisting steel pipe parts are suitable for coal conveying, powder feeding, ash discharging pipeline and coal preparation plant transportation pipeline in thermal power plant boiler system.


Classification and designation of wear-resistant pipes for power industry

The abrasion pipe of thermal power plant is mainly conveying raw coal powder, ash slag, flue gas desulfurization (FGD) limestone powder and slurry, due to the transmission of medium velocity fast, poor operating conditions, resulting in pipelines, especially elbow, variable diameter pipe serious wear and corrosion, not only consumes a lot of metal materials, but also to the thermal power plant security, economic operation has brought hidden dangers. The abrasion mechanism of pipeline is mainly based on erosion wear.

Wear-resistant pipe can be divided into two categories: single metal pipe and composite pipe.

Abrasion resistant Straight pipes be Long-term use in power plants

Abrasion resistant pipe elbows be Long-term use in power plants

Power industry wear-resistant pipe variety, pipe code, use characteristics, application range and nominal diameter see the following table:

TypesWear-resistant pipe codeUsage characteristics and application rangeDN/mm
Low alloy wear-resisting cast steel pipe
(Single metal pipe)
ZG40GrNiMoGGood abrasion resistance, high strength, poor weldability, suitable for pulverized coal and ash pipeDN100-1000
ZG45Cr2MoGGood abrasion resistance, high strength, poor weldability, suitable for pulverized coal and ash pipe
Medium Alloy wear-resisting cast steel pipeBTMCr30GGood abrasion resistance, high strength, poor weldability, suitable for pulverized coal and ash pipeDN100-1000
ZG42Cr2Si2MnMoGGood abrasion resistance, high strength, poor weldability, suitable for pulverized coal and ash pipe

(Single metal pipe)




BTMCr30GGood abrasion resistance, corrosion resistance, high strength, can not be welded, suitable for corrosion-resistant wear pipelineDN30-1200
BTMCr26GGood abrasion resistance, low strength, no soldering, suitable for pulverized coal pipingDN40-1200
BTMCr20GGood abrasion resistance, low strength, no soldering, suitable for pulverized coal pipingDN100-1000
BTMCr15GGood abrasion resistance, low strength, no soldering, suitable for pulverized coal piping
BTMCr12GGood abrasion resistance, low strength, no soldering, suitable for pulverized coal piping
BTMCr8GGood abrasion resistance, low strength, no soldering, suitable for pulverized coal piping
BTMCr2GGood abrasion resistance, low strength, no soldering, suitable for pulverized coal piping
Anti-abrasion white cast iron
(Bimetal Composite Pipe)




BTMCr30-GGood erosion resistance, high strength, can be welded, suitable for limestone, gypsum, pulverized coal and ash pipeDN30-1200
BTMCr26-GGood abrasion resistance, high strength, can be welded, applicable to pulverized coal and ash pipe, used for slurry, coal slurry conveyingDN40-1200
BTMCr20-GGood abrasion resistance, high strength, can be welded, applicable to pulverized coal and ash pipe, used for slurry, coal slurry conveyingDN40-1000
BTMCr15-GGood abrasion resistance, high strength, can be welded, suitable for pulverized coal and ash pipe
BTMCr12-GGood abrasion resistance, high strength, can be welded, suitable for pulverized coal and ash pipe
BTMCr8-GGood abrasion resistance, high strength, can be welded, suitable for pulverized coal and ash pipe
BTMCr2-GGood abrasion resistance, high strength, can be welded, suitable for pulverized coal and ash pipe
Inner wall surfacing composite pipeDNM-IV-GExcellent abrasion resistance, can be welded, suitable for pulverized coal and ash pipe≥DN200
DNM-V-GExcellent abrasion resistance, can be welded, suitable for pulverized coal and ash pipe
Alumina ceramic composite lined pipeAluminum Thermal MethodTR-G
Ceramic Lined composite steel pipe
Wear resistance is very good, high strength, can be welded, easy installation, applicable to pulverized coal and ash pipe, hot air pipe and economizer, hot air pipe, powder conveying, the product cost-effective.DN32-1200
Paste methodTC-GGood abrasion resistance, high strength, can not be welded, suitable for pulverized coal and ash pipe, desulfurization slurry pipe and variable diameter pipe≥DN200
Rubber composite lined PipeXS-GGood abrasion resistance, high strength, no welding, suitable for operating temperature -40~100℃ slag pipeDN50-1200
High temperature wear-resisting liner compound pipeWM-GGood wear resistance, high strength, can be welded, suitable for working temperature less than 1800 ℃ dry powder pipe, hot air pipe≥DN100
Cast stone composite lined pipeZS-GGood abrasion resistance, low casting strength, high brittleness, can not be welded, applicable to pulverized coal and ash pipe, desulfurization slurry pipe≥DN40
SIC lined composite pipeSiC-GGood abrasion resistance, can not be welded, suitable for pulverized coal and ash pipe, desulfurization slurry pipe≤1200

Application of Abrasion resistant pipe in Dense Medium System

Serious wear and tear of the pipeline not only caused a lot of material waste and media running, running, dripping, leakage, and frequent pipeline maintenance replacement, increasing the labor intensity of workers, increased production costs.

wear resistant pipe applications coal preparation plant site

As the medium pipeline is the transmission of high hardness, abrasive strong media suspension, the pressure of the feed cyclone into the tube, in addition to transport media suspension, but also includes coal and gangue. Therefore, compared with the slime mixed pipeline, the media pipe wear speed faster, especially the pressure pipe, such as the cyclone into the material tube, disengage sieve into the material and so on. According to the different materials and flow channels, the general life of the metal pipe material in about a few months to a year or so.

Coal preparation plant site

Many types of Abrasion resistant pipe, pipe diameter needs to be measured on-site

In recent years, wear-resistant technology and the rapid development of wear-resistant materials, Abrasion resistant pipe technology in addition to metal mines, construction, power plants and other areas of application, in the field of heavy media coal preparation has also been widely promoted, greatly improving the heavy pipe Of the service life, reducing the maintenance workload and material consumption, and promote the rapid development of heavy media coal preparation technology.

Commonly used wear-resistant media tube

Common wear-resistant pipe mainly stone pipe, ceramic wear-resistant pipe, alloy wear-resistant pipe. Cast stone is a natural rock as the main raw material, by ingredients, melting, burning, annealing made of an inorganic non-metallic materials. It has excellent wear resistance, corrosion resistance.

China’s metallurgical, thermal power, mining, chemical building materials and other departments are widely used cast stone materials. The main raw material for the production of cast stone is the broadly distributed basalt and diabase, which are basic magmatic rocks, and the chemical composition is relatively stable. Cast pipe than the alloy tube wear, tough, and has a high corrosion resistance, can be resistant to hydrofluoric acid and overheating of any acid and alkali corrosion. But the cast stone tube density is high, brittle, impatient impact, easy to break, the production process is complex, installation and maintenance is not convenient.

Ceramic wear tube is made of self-propagating high temperature synthesis centrifuge. The seamless steel pipe on the centrifuge tube mold, in the steel pipe by adding iron and aluminum powder mixture. This mixture is called aluminum heat in chemistry. Centrifuge tube mold rotation to a certain speed, the Mars ignited aluminum heat agent, aluminum heat agent immediately burn their own, burning quickly spread, and in the spread of a violent chemical reaction, aluminum heat agent after the reaction of corundum and iron, At the same time release a lot of heat, is the original material in the steel pipe and the reaction after the product, even if the melting point of 2045 ° corundum will all melt, because the reaction is very fast, only a few seconds, the molten reactant in the centrifugal force, Size to be separated. Iron is centrifugal force thrown to the inner wall of steel, Al2O3 is distributed in the inner layer of iron. As the steel pipe quickly heat and heat transfer, Al2O3 and Fe quickly reached the freezing point, and soon stratified solidification. The final formation of ceramic wear-resistant tube from the inside out, respectively, corundum ceramic layer, iron-based transition layer, and the external steel pipe layer. High temperature molten iron liquid.

And the Al2O3 liquid, contact with the inner wall of the steel pipe, so that the inner wall of the steel pipe in the semi-molten state, so that the formation of iron and steel pipe metallurgical structure, iron layer and corundum ceramic layer between the liquid formation of a strong combination of its combined strength (that is, Laminated strength)> 15MPa; ceramic wear-resistant tube crushing strength (that is, from the tube outside the tube when the strength of ceramic crushing)> 350MPa.

Ceramic tile lined pipe & fittings

Ceramic tile lined pipe and the traditional steel pipe, wear-resistant alloy cast steel pipe, cast stone pipe and steel pipe and other essential differences. Ceramic tile lined pipe is a seamless steel pipe, the inner layer is corundum, this corundum is molten state under the action of centrifugal casting. Corundum layer hardness up to HV1200 ~ 1400, it is better than the ordinary combination of corundum grinding wheel performance is much better, can be corundum grinding wheel wear off.

Ceramic tube wear resistance is mainly by the inner layer of a few millimeters thick corundum layer, which wear-resistant alloy cast steel pipe, cast stone pipe both by the composition and organization, but also by the thickness of the anti-wear has been a qualitative leap. The same specifications and unit length of the quality of Ceramic tile lined pipe only wear-resistant alloy steel pipe 1/2, cast pipe 1/3; the cost per meter project reduced by 30% to 40%; so ceramic wear pipe in addition to performance Superior, the project cost also has obvious advantages.

Ceramic tile lined pipe with good thermal shock resistance, this performance in the construction of useful. As the outer layer of steel, coupled with the inner temperature does not crack, in the construction, the flange, purge mouth

And so can be welded, can also be used direct welding method for pipe connection, which wear-resistant alloy cast stone pipe and cast stone pipe in the construction is not easy welding and welding can not be better. In case the production site due to special reasons, ceramic wear tube rupture situation, can be immediately emergency welding to ensure safe production and prevent environmental pollution. It should be noted that the thickness of the ceramic layer in the Ceramic tile lined pipe is not uniform, and it is possible to break out during the transportation, installation, tapping and bending deformation between the two stands, resulting in uneven wear during operation and affecting the use Life, and even cause short-term local steel pipe damage.

SHS ceramic lined pipes

Ceramic (Corundum: a-Al2O3) lined abrasion resistant straight pipe and fittings are lined with highly abrasion resistant ceramic by SHS ——-Self-propagating High-temperature Synthetic process.

Ultra-high composite wear-resistant pipe is a combination of internal and external pipe. It is a polymer material as the main material, adding the necessary additives, additives made into wear-resistant inner tube to Q235 steel plate as raw material, coil welded together made of such pipes with high wear resistance, good corrosion resistance (Strength, toughness), impact, play a supporting role, to withstand external pressure, so as to avoid collapse; and to adapt to changes in ambient temperature, light weight, easy to operate processing. Ultra-wear-resistant composite pipe wear resistance, long life, mechanical noise, the use of the product can change the coal preparation plant before the frequent replacement of pipes, downtime for a long time, the amount of maintenance of the situation, that is, improve the efficiency of the coal preparation plant, But also reduce the labor intensity of workers, reducing the maintenance workload. Table 10-16 for the ceramic wear-resistant tube and super-wear-resistant composite pipe technical and economic indicators, for reference.

Metal ceramic lined with composite pipe

Metal Ceramic Liner Composite pipe is the use of SHS high temperature synthesis technology, that is, “SHS” technology composite, is a national High-tech “863” project, is the original national metallurgical Industry Department, the Ministry of Electricity Project focused on the promotion of new products, the tube from within to outside by ceramic (corundum) layer, transition layer and steel layer composed of three parts.
metal-ceramic-lined-with-composite-pipe
Ceramic composite steel pipe, is a high-tech production technology-self-fuel high temperature clutch synthesis method. The tube is composed of corundum ceramics, transition layer and steel three layers respectively from inside to outside, the ceramic layer is formed dense corundum porcelain (Al2O3) at high temperature above 2,200 ℃, and the steel pipe is formed firmly by the transition layer.

Sand injection test 30% Transfer test of sludge with SiO2
Material Volume diminution
(cm3)
Material Volume diminution
(cm3)
Ceamic lining
Steel pipe
0.0022 Ceamic lining
Steel pipe
3
Ceramic pipe
Al2O397%
0.0025 S45C 25

Because of its high strength, good toughness, impact resistance, good welding performance and high hardness, high abrasion resistance, corrosion resistance and heat resistance, the composite pipe overcomes the characteristics of low hardness, poor abrasion resistance and poor toughness of ceramic steel pipe. Therefore, the composite pipe has good wear-resistant, heat-resistant, corrosion resistance and mechanical impact and thermal shock, good weldability and other comprehensive performance. Is the transportation of granular materials, grinding, corrosive media, such as the ideal wear-resistant, corrosion resistance pipeline.
Because the tube has wear resistance, corrosion resistance, heat resistance, it can be widely used in electric power, metallurgy, mining, coal, chemical industry and other industries as conveying sand, stone, pulverized coal, ash slag, aluminum liquid, such as grinding granular materials and corrosive media, is an ideal corrosion-resistant pipeline.
I. Application in metallurgy and electric power industry
Metallurgy, power industry transportation of pulverized coal, ash, mud, limestone paste slurry, such as the annual need to consume a large number of metal pipelines. The use of ceramic composite pipe to replace other pipelines, with high wear-resistant, long life, easy installation and remarkable economic benefits. Shandong Liaocheng Chang-run thermal power plant, Liaocheng China power Plant, Beijing North New building materials group, Henan Hebi Power Plant, Gansu Pingliang Power Plant, Taiyuan Coal preparation plant, Shimen power plant in Hunan, Hebei Jinniu Energy Co., Ltd. Gequan Coal Preparation plant, Xingtai coal preparation plant and other industrial operations, its operating life is more than 10 times times or even dozens of times times more than steel pipe.
II. application in mining and coal industry
(1) Mine: mine filling, concentrate powder and tailings transportation to the pipeline of serious wear, the past use of mineral powder conveying pipelines such as Panzhihua, Daye mine, such as the service life of less than one year, the tube can increase the life expectancy by about 5 times times.
(2) Coal: Coal preparation and long-distance pipeline transportation of coal is commonly used in wet transport, the requirements of the pipe is both wear-resistant and corrosion-resistant, the use of the tube can be used as a long life transport pipe, the economic benefits are considerable.
Iii. Other
(1) The tube does not pollute and does not adhere to the molten aluminum solution. It is an ideal material to manufacture molten aluminum equipment, aluminum liquid conveying pipe and liter liquid pipe which are sensitive to iron pollution and need heavy labor for finishing and maintenance after use.
(2) The tube has good abrasion resistance and heat-resisting corrosion. It is suitable for conveying corrosive materials containing solid particles and high temperature corrosive gas and sulfur-containing hot water.
 

Ceramic lined composite Y-type Tee

We specialize in Ceramic lined composite Y-type Tee and flow conditioning assemblies to tame the most demanding flow applications.

Wear-resisting comparative table of ceramic lining pipe

Sand injection test 30% Transfer test of sludge with SiO2
Material Volume diminution
(cm3)
Material Volume diminution
(cm3)
Ceamic lining
Steel pipe
0.0022 Ceamic lining
Steel pipe
3
Ceramic pipe
Al2O3
0.0025 S45C 25

Abrasion
Ceramic layer Ceramic Lined Reducer Pipe with flange reducer Al2O3 content greater than 89% , micro-hardness HV1000-1500, which has a high abrasion resistance, wear resistance than ten times higher than carbon steel after quenching , superior tungsten carbide drill.
Application range

  • coal pulverizing system of power plant pipeline, including, powder transmission pipeline, thick powder separator pipeline, coal drop pipe, combustion system of a wind pipe, a secondary air pipe, three pipeline and burner pipelines, in addition to ash slagging system the discharge pipe, powder pipe, dry ash conveying pipe;
  • iron and steel plant raw material conveying pipeline, collecting pipe, dust pipe, ash pipe, ash pipe, mixing pipe, grinding export pipeline, coal pipeline, coal pipeline, separator pipe, burner radius pipe, etc.;
  • cement plant selection machine outlet pipe, choose machine inlet pipe, pipe dust pipe, vertical mill outlet pipe, circulating air duct, high temperature air blower, lower material pipe, etc.;
  • petroleum, chemical, mining, coal, coal washing plant, smelting, paper, aluminum, building materials, powder engineering, food machinery and other processing and conveying material pipe.

Corrosion
Ceramic materials are neutral , chemically stable , has excellent corrosion resistance and acid resistance , resistant to various inorganic acids, organic acids , organic solvents , and its degree of corrosion of stainless steel is more than ten times.
Temperature
Temperature above 2000celsius degree, long-term work in the range of -50 -900 celsius degree.
Easy welding
Ceramic adjustable tube can be welded , flanged , flexible connectors and other fast way links , very easy to install.
Clean and easy maintenance
Smooth wall, can prevent scaling , fouling, self-cleaning function. Tightness.
Remarks:

  • Under the direction of the arrow diagram for the export direction.
  • Bend radius is usually 1.5-5 times the diameter of steel pipe (1.5-5D).
  • Othe specifications of the compsite pipe can be manufactured accord to the user requirments.
  • The weight is caculate by theoretics, maybe have some tolerance, the real weight will be weigh in afer them finished.

Hoop strength is the resistance against radial pressure. The strength of the ceramic -lined steel composite pipe is 300 to 500MPa.