Boiler tubes

Boiler tubes are used in heat exchange appliances in which the energy is transferred from one medium to the other.

How to choose good quality boiler tubes

How to choose good quality boiler tubes?

While choosing boiler tubes, look for the following to pick out the right and good quality tubes:

  1. Look at the cross-section of the tube. A good quality seamless tube will have a smooth cross-section and will be devoid of bumps and irregularities.
  2. Check the density of the pipe to understand the percentage of impurities in the pipe. If the pipe shows low density, steer clear!
  3. Check the surface of the boiler tube. A good quality boiler tube will have a smooth surface. If you find the surface to be rough and uneven, you can be sure that the quality is not up to the mark.

Boiler Tube Standard Specifications

Sunny Steel has an extensive range of boiler and stay tubes available to meet your boiler tube requirements no matter how demanding.

GB

Chinese National standards

  • GB 3087: Seamless steel tubes for low and medium pressure boiler
  • GB 5310: Seamless steel tube for high pressure boiler
  • GB 13296: Seamless steel tubes for boilers and heat exchangers
  • GB 6479: Seamless steel tubes for high-pressure chemical fertilizer equipment
  • GB 9948: Seamless steel tubes for petroleum cracking
ASME

American society of mechanical engineers

  • ASME SA-106: Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service
  • ASME SA-192M: Seamless Carbon Steel Boiler Tubes for High Pressure
  • ASME SA-209M: Seamless carbon-Molybdenum Alloy-Steel Boiler and Superheater Tubes
  • ASME SA-210M: Seamless Medium-carbon Steel Boiler and Superheater Tubes
  • ASME SA-213M: Seamless ferritic and austenitic alloy steel boiler, superheater and heat exchanger tubes
  • ASME SA178: Electric-Resistance-Welded Carbon Steel and Carbon-Manganese Steel Boiler and Superheater
ASTM

Chinese National standards

  • ASTM A213: Seamless ferritic and austenitic alloy steel boiler, superheater and heat exchanger tubes
  • SA213-T2: ASME SA213 T2 has allowable stresses listed up to 1000F in the ASME Boiler Code.
  • SA213-T9
  • SA213-T12: Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, Heat-Exchanger Tubes.
  • SA213-T11: The tubes are used in heat exchangers, super heaters and in boilers.
  • SA213-T22: ASM T22 Boiler Tube is a high temperature tolerance tube that is used in acidic and corrosive environments such as the hydrochloric processing and in aluminum chloride catalyst involving applications.
  • ASTM A 106M: Seamless Carbon Steel Pipe for High-Temperature Service
  • ASTM A192M: Seamless Carbon Steel Boiler Tubes for High Pressure
  • ASTM A210M: Seamless Medium-carbon Steel Boiler and Superheater Tubes
  • ASTM A 335M: Seamless ferritic alloy-steel pipe for high-temperature service
EN

Deutsche industrie normen

  • EN 10216-2 : Seamless steel tubes for pressure purposes
DIN

Deutsche industrie normen

  • DIN 17175:Seamless Tubes of Heat-resistant Steels - Technical Conditions of Delivery
JIS

Japanese industrial standards

  • JIS G3461: Carbon steel boiler and heat exchanger tubes
  • JIS G3462: Alloy steel boiler and heat exchanger tubes
  • JIS G3463: Stainless Steel for Boiler and Heat Exchanger Tubes
STAINLESS STEELS

– Austenitic stainless steels

  • SA213-T304:– The SA 213 Tp 304 Material consists of 18% chromium and carbon, manganese, phosphorus, sulfur, silicon and nickel in the composition.

    SA213 TP304 is a range of minimum wall thickness pipe series. We supply the SA 213 TP 304 Pipes in different types, shapes and sizes. The SA 213 Tp 304 Material consists of 18% chromium and carbon, manganese, phosphorus, sulfur, silicon and nickel in the composition. There is also the molybdenum, nitrogen, niobium and titanium addition in trace quantities. The SA 213 Tp 304 Density is lower than the ordinary 304 material. It is 7.8 grams per cubic centimeter. We offer ASTM A213 TP 304 for high temperature services. Our 304 Stainless Steel Tube components are of less absolute roughness which means they could be used in high precision equipment and applications.

    Austenitic stainless steels are presented in the ASME Boiler and Pressure Vessel Code with two sets of allowable stresses. The reason for this is their relatively low yield strength. The higher allowable stress values were determined at temperatures where the usage would be restricted by the short-time tensile properties.

    The higher stresses exceed 62-1/2%, but do not exceed 90% of the yield strength. At these stresses, small amounts of plastic deformation can be expected. These higher stress values are usually used for super-heater and reheater tubing.

    The Boiler Code lists maximum allowable stresses for varying temperatures depending on the individual austenitic stainless grade.

    Variations of this 18 chromium, 8 nickel grade include 304L, 304LN, 304H and 304N. Each of these offers excellent corrosion and oxidation resistance along with high strength.
    High strengths are maintained in the low carbon grades by controlling the nitrogen content.

    T304 has higher carbon and a minimum solution annealing temperature to assure good long-time elevated temperature strengths. T304 grades are limited to 1650F under oxidizing conditions. Section I of the ASME Boiler Code lists allowable stresses up to 1500F.

  • SA213-T316: – SA213 TP316 Tube is a material standard for heat exchanger tubes that are made from 316 austenitic stainless steel.

    The chromium nickel alloy also has molybdenum in its composition which makes it more corrosion resistant and heat resistant than the 304 material. ASME SA213 TP316 is the second most used pipe material in the world next to the 304 material. ASTM A213 TP316 Tube is an austenitic stainless steel but the 213 standard covers both the austenitic and ferritic steels.

    Sunny Steel is a supplier of ASTM A213 Grade TP316 products in different standards and sizes. Our 316 Stainless Steel Tube can come with different finishing such as the 316 Stainless Steel Tubing Polished or electropolished. We also provide the pipes in different shapes such the round, rectangular or Stainless Steel 316 Square Tube. The square and 316 Stainless Steel Rectangular Tube is usually used in high pressure applications to withstand the pressure stress at change of directions. The Stainless Steel 316 Seamless Tube is more accurate in dimensions and therefore it is used in high precision applications. Our 316 Stainless Steel Exhaust Tubing is of high quality and can withstand high temperatures; it is used in exhausts, heat exchangers and super heaters. The 316 Stainless Steel Heavy Wall Tubing is used in high pressure applications such as hydraulic systems. Our SS 316 Welded Tube is easy to weld upon. We supply 316 Stainless Steel Welded Tube for affordable prices in different sizes and schedules. Please contact us for further details and pricing.

  • SA213-TP321 & 347– SA213 TP321 is a specification of heat exchanger tubes that are made from the 321 austenitic stainless steel.

    SA213 TP321 is a specification of heat exchanger tubes that are made from the 321 austenitic stainless steel. The SA 213 specifies pipe products for heat exchangers in different material grades, both the ferritic and austenitic steels.

    Sunny Steel is a supplier of all kinds of stainless steel pipes. The SA213 Tp321 Material is special in that the composition includes titanium which reduces the density of the ASME SA213 Tp321 and therefore making it lightweight.

    T321 and 347 are variations of T304 and have comparable minimum tensile properties. These two grades are stabilized with additions of titanium and columbian respectively, along with proper heat treatment.

    To insure good long-time strength at elevated temperatures, T321H and 347H-like 304H-were developed with higher carbon contents and specified minimum solution annealing temperatures.

    Of all the stainless steels, T309 (25 chromium, 13 nickel) and T310 (25 chromium, 20 nickel) offer the maximum resistance to oxidation and corrosion. They also offer good high-temperature properties. Since these steels contain ferrite, however, they are more susceptible to sigma phase.

Boiler tube ends

The ends are vertical to the longitudinal axis and are without burrs.

The tubes with deburred ends or ends customized for welding.

Deburring applies to

Tube OD 26.7 - 114.3 mm
Tube WT 3.2 - 12.5 mm
Tube lengths 4 - 13 meters
Deburring angle, a 30°+ 5 and 37°± 2.5
Dimension, c 1.6 ± 0.8 mm

Quality Assurance

We have capability and capacity to ensure boiler tube in superior condition, with advanced inspection and testing procedures, standard tests include dimensional examination, visual checking, chemical composition, mechanical properties as well as non destructive test 100% eddy current test.

Fire Tube Boiler

Fire-tube boiler is a type of boiler in which hot gas passes from the fire through one or more pipes that pass through a sealed water container. The heat of the gas is transferred through the wall of the tube through heat conduction, heating the water and eventually generating steam. Fire tube boilers are the third of the four historical types of boilers: low-pressure tank or “haystack” boilers, flue boilers with one or two large flues, fire tube boilers and high-pressure boilers with many small tubes

Water Tube Boiler

Water tube boiler is a type of boiler in which water circulates in tubes heated externally by the fire. The fuel is burned in the furnace to produce hot gas, which heats the water in the steam generation tube. In smaller boilers, the additional power generation tubes are separated in the furnace, while larger utility boilers rely on water injection tubes that make up the furnace wall to generate steam. High-pressure water tube boiler: The hot water then rises into the steam drum. Here, saturated steam is drawn away from the top of the drum.


Packing

Download Boiler tubes

Main products and applications

Boiler Tubes are metal tubes located inside of boilers that heat water in order to produce steam. There are two major types of tube boilers: water-tube boilers and fire-tube boilers. In water-tube boilers, water circulates inside the tubes and is heated externally by hot gases generated by the furnace. Boiler tube is installed inside boiler to heat water in order to generate steam, boiler is a closed pressure vessel designed in varieties of types, water tube boiler and fire tube boiler are main types.

  • Welded boiler tubes can be supplied from stock to suit your needs
  • Hot finished boiler tubes can be supplied from new production
  • We can arrange cutting, deburring and testing
  • Boiler tubes can be swaged/bulged to suit your requirements
  • Shipping can be arranged worldwide
  • Stock lengths ranging from 10200-12250mm
Steel Grade Standard Application
GB(China) ASME(USA) DIN/EN(Euro)
Carbon steel 10
20
20G
20MnG
25MnG
SA-106B
SA-192
SA-210A1
SA106C
SA-210C
PH265GH
P195GH
P235GH
St35.8
St45.8
Economizer tube
Water wall tube
Mo steel 15MoG
20MoG
SA-209 T1
SA-209 T1a
SA-209 T1b
15Mo3
16Mo3
Water wall tube
Superheater tube
Reheater tube
Cr-Mo Steel 12CrMoG
12Cr2MoG
12Cr1MoVG
15CrMoG
10Cr9MoVNb
SA-213 T11 SA-213 T22
SA-213 T24 SA-213 T91
A335 P1  A335 P2
A335 P5  A335P9
A335 P11 
12Cr1MoV
14MoV63
10CrMo910
X10CrMoVNb91
10CrMo5-5, 13CrMo4-5
Superheater tube
Reheater tube
Cr-Mo-W steel 12Cr2MoWVTiB SA-213 T23 SA-214 T911
SA-213 T92 SA-213 T122
A335 P23 A335 P911
A335 P92 A335 P122
  ---   Superheater tube
Reheater tube
Austentic Stainless steel   ---   AP304  TP304H
TP321 TP321H
TP347 TP347H
TP316 TP316H
S30432 TP310HCbN
  ---   Superheater tube
Reheater tube

Process flowchart

Process flowchart

Facilities & Services

ASTM A213 T91
Beveling & Cutting
SunnySteel can provide OD beveling and cut your boiler tubes to any length.
Steel pipe hydrostatic testing
High-pressure boiler tubes are frequently occurs fault...
Special Packaging
SunnySteel can supply wood blocking, crating, capping and wrapped ends.

Size range, tolerance and specifications

Tubes are processed by cold drawn, heat treated and pickling finishes, cleaning and smooth surface inside and outside should be made, quality tubes have the capacity of standing in high pressure and high temperature conditions.

Tolerances on out diameter
Standard Hot finished seamless tube Cold flnished seamless tube
Out diameter
(mm)
Tolerance Out diameter
(mm)
Tolerance
EN10216-1
EN10216-2
DIN17175
≤100  +/-0.75%
(min.+/-0.5mm)
All  +/-0.5%
(min. +/-0.30mm)
>100  +/-0.90%
GB/T 3087 ≤460  +/-0.75%
(min.+/-0.5mm)
 10-30   +/-0.40mm
>30-50  +/-0.45mm
>50  +/-1.0%
GB/T 5310
GB/T 9948
GB/T 6479
<57  +/-0.40mm ≤30  +/-0.20mm 
 57-325   +/-0.75% >30-50   +/-0.30mm 
>325-460  +1%,-2mm >50  +/-0.8% 
ASME SA-179M
ASME SA-192M
ASME SA-209M
ASME SA-210M
ASME SA-213M
JIS G 3461
JIS G 3461
≤101.6  +0.4, -0.8mm <25.4  +/-0.10mm
>25.4-38.1  +/-0.15mm
>38.1-50.8  +/-0.20mm 
101.6-190.5  +0.4, -1.2mm >50.8-63.5  +/-0.25mm
>63.5-76.2  +/-0.30mm 
>76.2  +/-0.38mm
ASME SA106
ASME SA335
≤48.3  +/-0.40mm  ≤48.3  +/-0.40mm
 48.3-114.3  +/-0.79mm 
114.4-219.1  +1.59, -0.79mm 
219.2-323.9  +2.38, -0.79mm >48.3  +/-0.79mm 
>324  +/-1.0%
Tolerances on wall thickness
Standard Hot finished seamless tube Cold flnished seamless tube
Out diameter
OD(mm)
Wall thickness
T(mm)
Tolerance Out diameter
(mm)
Wall Thickness
T(mm)
Tolerance
DIN17175 ≤130 S≤2Sn  +15%, -10%    -- All  +/-10%
(min. +/-0.2mm)
2Sn<S≤4Sn  +12.5%, -10% 
S>4Sn  +-/9%
>130 S≤0.05da  +17.5%, -12.5% 
0.05da<S≤0.11da  +/-12.5% 
S>0.11da  +/-10% 
EN 10216-1
EN 10216-2
 ≤219.1   -    +/-12.5%
(min.+/-0.4mm) 
 --  T/D≤0.025  +/-20% 
0.025<T/D≤0.050  +/-15% 
0.05<T/D≤0.10  +/-12.5% 
0.1<T/D  +/-10% 
GB/T 3087  --  ≤20  +15%,-12.5%
(min.+0.45, -0.35mm)
 --   1.0-3.0   +15%, -10% 
>20  +/-12.5%   --  >3  +12.5%, -10% 
GB/T 5310
GB/T 9948
GB/T 6479
 --  <4.0  +15%,-10%
(min.+0.48, -0.32mm)
 --   2-3   +12%,-10% 
 4-20   +12.5%,-10%  >3  +/-10% 
>20  +/-10%
ASME SA-179M
ASME SA-192M
ASME SA-209M
ASME SA-210M
ASME SA-231M
JIS G 3461
JIS G 3462
 --   2.41-3.8   +35%, -0%  ≤38.1  --   +20%,-0% 
 3.8-4.6   +33%,-0%  >38.1  --  22%,-0% 
>4.6  +28%,-0%   --   --   -- 
ASME SA-106
ASME SA-335
 --  All  +/12.5%    All  +/-10% 
Available size range of boiler tube

Boiler pipe size range complied with the different ASTM standard required. Like ASTM A106 or ASTM 179, 192 etc.

Straightness of boiler tubes :

Allowed straightness is 0.0015 multiple of the tube length, for 1 meter length the allowed straightness is 3 millimeters.

Seamless boiler tubes surface protection: While ordering, it is necessary to agree upon the method and means of temporarily protecting the surface of the tubes during transportation and storage.

How to choose good quality boiler tubes
Size Wall Thickness(mm)
 O.D.(mm) 2 2.5 3 3.5 4 4.5 5 6 6.5-7 7.5-8 8.5-9 9.5-10 11 12
Φ25-Φ28                
Φ32                
Φ34-Φ36                
Φ38                
Φ40                  
Φ42                  
Φ45                
Φ48-Φ60              
Φ63.5              
Φ68-Φ73                
Φ76        
Φ80        
Φ83        
Φ89        
Φ95        
Φ102        
Φ108        
Φ114          
Φ121          
Φ127          

Chemical & Mechanical properties of available steel grades

Checial composition
Standard Steel Grade C Si Mn S P Cr Mo V Ti B W Ni Al Nb N Others
GB 3087 10 0.07-0.13 0.17-0.37 0.35-0.65 0.020 0.025 ≤0.15                    
20 0.17-0.23 0.17-0.37 0.35-0.65 0.020 0.025 ≤0.25                    
DIN 17175 St 35.8 ≤0.17 0.10-0.35 0.40-0.80 0.020 0.025                      
St 45.8 ≤0.21 0.10-0.35 0.40-1.20 0.020 0.025                      
15Mo3 0.12-0.20 0.10-0.35 0.40-0.80 0.020 0.025   0.25-0.35                  
13CrMo44 0.10-0.18 0.10-0.35 0.40-0.70 0.020 0.025 0.70-1.10 0.45-0.65                  
10CrMo910 0.08-0.15 ≤0.50 0.40-0.70 0.020 0.025 2.00-2.50 0.90-1.20                  
14MoV63 0.10-0.18 0.10-0.35 0.40-0.70 0.020 0.025 0.30-0.60 0.50-0.70 0.22-0.32                
12Cr1MoV 0.08-0.15 0.17-0.37 0.40-0.70 0.020 0.025 0.90-1.20 0.25-0.35 0.15-0.30                
GB5310 20G 0.17-0.23 0.17-0.37 0.35-0.65 0.015 0.025                      
20 MnG 0.17-0.24 0.17-0.37 0.70-1.00 0.015 0.025                      
25 MnG 0.22-0.27 0.17-0.37 0.70-1.00 0.015 0.025                      
15 MoG 0.12-0.20 0.17-0.37 0.40-0.80 0.015 0.025   0.25-0.35                  
20 MoG 0.15-0.25 0.17-0.37 0.40-0.80 0.015 0.025   0.44-0.65                  
12CrMoG 0.08-0.15 0.17-0.37 0.40-0.70 0.015 0.025 0.40-0.70 0.40-0.55                  
15CrMoG 0.12-0.18 0.17-0.37 0.40-0.70 0.015 0.025 0.80-1.10 0.40-0.55                  
12Cr2MoG 0.08-0.15 ≤0.60 0.40-0.60 0.015 0.025 2.00-2.50 0.90-1.13                  
12Cr1MoVG 0.08-0.15 0.17-0.37 0.40-0.70 0.010 0.025 0.90-1.20 0.25-0.35 0.15-0.30                
12Cr2MoWVTiB 0.08-0.15 0.45-0.75 0.45-0.65 0.015 0.025 1.60-2.10 0.50-0.65 0.28-0.42 0.08-0.18 0.002-0.008 0.30-0.55          
10Cr9Mo1VNbN 0.08-0.12 0.20-0.50 0.30-0.60 0.010 0.020 8.00-9.50 0.85-1.05 0.18-0.25       ≤0.040 ≤0.040 0.06-0.10 0.03-0.07  
07Cr19Ni10 0.04-0.10 ≤0.75 ≤2.0 0.015 0.035 17.00-20.00   8.00-11.00                
07Cr18Ni11Nb 0.04-0.10 ≤0.75 ≤2.0 0.150 0.030 17.00-19.00           9.00-13.00 8C-1.10      
ASTMA 106
ASME SA-106M
A 106B
SA-106B
≤0.30 ≥0.10 0.29-1.06 0.020 0.025                      
A 106C
SA-106C
≤0.35 ≥0.10 0.29-1.06 0.020 0.025                      
ASTM A192
ASME SA-192M
SA 192
SA-192
0.06-0.18 ≤0.25 0.27-0.63 0.020 0.025                      
ASTM A209
ASME SA-209M
A209T1
SA-209T1
0.10-0.20 0.10-0.50 0.30-0.80 0.020 0.025   0.44-0.65                  
A209T1b
SA-209T1b
≤0.14 0.10-0.50 0.30-0.80 0.020 0.025   0.44-0.65                  
A209T1a
SA-209T1a
0.15-0.25 0.10-0.50 0.30-0.80 0.020 0.025   0.44-0.65                  
ASTM A210
ASME SA-210M
A 210A1
SA-210A1
≤0.27 ≥0.10 ≤0.93 0.020 0.025                      
A 210C
SA-210C
≤0.35 ≥0.10 0.29-1.06 0.020 0.025                      
ASTM A213
ASME SA-213M
A 213 T2
SA-213 T2
0.10-0.20 0.10-0.30 0.30-0.61 0.020 0.025 0.50-1.81 0.44-0.65                  
A 213 T11
SA-213 T11
0.05-0.15 0.50-1.00 0.30-0.60 0.020 0.025 1.00-1.50 0.44-0.65                  
A 213 T12
SA-213 T12
≤0.15 ≤0.50 0.30-0.61 0.020 0.025 0.80-1.25 0.44-0.65                  
A 213 T22
SA-213 T22
0.05-0.15 ≤0.50 0.30-0.60 0.020 0.025 1.90-2.60 0.87-1.13                  
A 213 T23
SA-213 T23
0.04-0.10 ≤0.50 0.10-0.60 0.010 0.025 1.90-2.60 0.05-0.30 0.20-0.30 0.005-0.06 0.0005-0.006 1.45-1.75   ≤0.03 0.02-0.08 ≤0.03 Ti/N≥3.5
A 213 T24
SA-213 T24
0.05-0.10 0.15-0.45 0.30-0.70 0.020 0.025 2.20-2.60 0.70-1.10 0.20-0.30 0.06-0.10 0.0015-0.0020     ≤0.02   ≤0.012  
A 213 T91
SA-213 T91
0.08-0.12 0.20-0.50 0.30-0.60 0.010 0.020 8.00-9.50 0.85-1.05 0.18-0.25       ≤0.40 ≤0.40 0.06-0.10 0.03-0.07  
A 213 T911
SA-213 T911
0.09-0.13 0.10-0.50 0.30-0.60 0.020 0.025 8.50-10.50 0.90-1.10 0.18-0.25   0.0003-0.006 0.90-1.10 ≤0.40 ≤0.40 0.06-0.10 0.04-0.09  
A 213 T92
SA-213 T92
0.07-0.13 ≤0.5 0.3-0.6 0.010 0.020 8.50-9.50 0.30-0.60 0.15-0.25   0.001-0.006 1.50-2.00 ≤0.4 ≤0.4 0.04-0.09 0.03-0.07  
A 213 T122
SA-213 T122
0.07-0.14 ≤0.5 ≤0.70 0.010 0.020 10.00-12.50 0.25-0.60 0.15-0.30   0.0005-0.005 1.50-2.50 ≤0.5 ≤0.4 0.040-0.10 0.040-0.100  
TP304H 0.04-0.10 ≤0.75 ≤2.0 0.030 0.040 18.00-20.00           8.00-11.000        
TP321H 0.04-0.10 ≤0.75 ≤2.0 0.030 0.040 17.00-20.00     4*C%-0.60     9.00-13.00        
TP347H 0.04-0.10 ≤0.75 ≤2.0 0.030 0.040 17.00-20.00           9.00-13.00       Nb+Ta≥8*C%-1.00
S30432 0.07-0.13 ≤0.30 ≤1.0 0.040 0.010 17.00-20.00       0.001-0.010   7.5-10.5 0.003-0.030 0.30-0.60 0.05-0.12 Cu 2.50-3.50
TP310HCbN 0.04-0.10 ≤0.75 ≤2.0 0.030 0.030 24.00-26.00           17.0-23.0   0.20-0.60 0.15-0.35  
EN10216-2 P195GH ≤0.13 ≤0.35 ≤0.70 0.020 0.025 ≤0.30 ≤0.08 ≤0.02 ≤0.040     ≤0.30 ≥0.02 ≤0.01   Cr+Cu+Mo+Ni≤ 0.70
P235GH ≤0.16 ≤0.35 ≤1.20 0.020 0.025 ≤0.30 ≤0.08 ≤0.02 ≤0.040     ≤0.30 ≥0.02 ≤0.01   Cr+Cu+Mo+Ni≤ 0.70
P265GH ≤0.20 ≤0.40 ≤1.40 0.020 0.025 ≤0.30 ≤0.08 ≤0.02 ≤0.040     ≤0.30 ≥0.02 ≤0.01   Cr+Cu+Mo+Ni≤ 0.70
16Mo3 0.12-0.20 ≤0.35 0.40-0.90 0.020 0.025 ≤0.30 0.25-0.35         ≤0.30 ≤0.04     Cu≤ 0.30
10CrMo5-5 ≤0.15 0.50-1.00 0.30-0.60 0.020 0.025 1.00-1.50 0.45-0.65         ≤0.30 ≤0.04     Cu≤ 0.30
13CrMo4-5 0.10-0.70 ≤0.35 0.40-0.70 0.020 0.025 0.70-1.15 0.40-0.60         ≤0.30 ≤0.04     Cu≤ 0.30
10CrMo9-10 0.08-0.14 ≤0.50 0.30-0.70 0.020 0.025 2.00-2.50 0.90-1.10         ≤0.30 ≤0.04     Cu≤ 0.30
X10CrMoVNb9-1 0.08-0.12 0.20-0.50 0.30-0.60 0.010 0.020 8.00-9.50 0.85-1.05 0.18-0.25       ≤0.40 ≤0.04 0.06-0.10 0.03-0.07 Cu≤ 0.30
JIS G3461 STB 340 ≤0.18 ≤0.35 0.30-0.60 0.020 0.025                      
STB 410 ≤0.32 ≤0.35 0.30-0.80 0.020 0.025                      
STB 510 ≤0.25 ≤0.35 1.00-1.50 0.020 0.025                      
JIS G3462 STAB 12 0.10-0.20 0.10-0.50 0.30-0.80 0.020 0.025   0.45-0.65                  
STAB 13 0.15-0.25 0.10-0.50 0.30-0.80 0.020 0.025   0.45-0.65                  
STAB 20 0.10-0.20 0.10-0.50 0.30-0.80 0.020 0.025   0.45-0.65                  
STAB 22 ≤0.15 ≤0.50 0.30-0.60 0.020 0.025 0.80-1.25 0.45-0.65                  
STAB 23 ≤0.15 0.50-1.00 0.30-0.60 0.020 0.025 1.00-1.25 0.45-0.65                  
STAB 24 ≤0.15 ≤0.50 0.30-0.60 0.020 0.025 1.90-2.60 0.87-1.13                  
STAB 26 ≤0.15 0.25-1.00 0.30-0.60 0.020 0.025 8.00-10.0 0.90-1.10                  
JIS G3463 SUS304HTB 0.04-0.10 ≤2.00 ≤0.75 0.020 0.025 18.00-20.00           8.00-11.000        
SUS321HTB 0.04-0.10 ≤2.00 ≤0.75 0.020 0.025 17.00-20.00     4*C%-0.60     9.00-13.00        
GB 13296 0Cr18Ni9 0.07 ≤1.00 ≤2.00 0.030 0.035 17.00-19.00           8.00-11.00        
1Cr18Ni9 ≤0.15 ≤1.00 ≤2.00 0.030 0.035 17.00-19.00           8.00-11.00        
00Cr19Ni10 ≤0.03 ≤1.00 ≤2.00 0.030 0.035 18.00-20.00           8.00-12.00        
2Cr23Ni13 ≤0.20 ≤1.00 ≤2.00 0.030 0.035 22.00-24.00           12.00-15.00        
0Cr23Ni13 ≤0.08 ≤1.00 ≤2.00 0.030 0.035 22.00-24.00           12.00-15.00        
2Cr25Ni20 ≤0.25 ≤1.00 ≤2.00 0.030 0.035 22.00-24.00           19.00-22.00        
0Cr25Ni20 ≤0.08 ≤1.00 ≤2.00 0.030 0.035 24.00-26.00           19.00-22.00        
0Cr17Ni12Mo2 ≤0.08 ≤1.00 ≤2.00 0.030 0.035 16.00-18.50 2.00-3.00         10.00-14.00        
1Cr17Ni12Mo2 0.04-0.1 ≤0.75 ≤2.00 0.030 0.035 16.00-18.00 2.00-3.00         11.00-14.00        
00Cr17Ni14Mo2 ≤0.03 ≤1.00 ≤2.00 0.030 0.035 16.00-18.00 2.00-3.00         12.00-15.00        
0Cr19Ni13Mo3 ≤0.08 ≤1.00 ≤2.00 0.030 0.035 18.00-20.00 3.00-4.00         11.00-15.00        
00Cr19Ni13Mo3 ≤0.03 ≤1.00 ≤2.00 0.030 0.035 18.00-20.00 3.00-4.00         11.00-15.00        
1Cr18Ni9Ti 0.04-0.1 ≤1.00 ≤2.00 0.030 0.035 17.00-19.00     5*(C-0.02)-0.80     8.00-11.00        
0Cr18Ni10Ti ≤0.08 ≤1.00 ≤2.00 0.030 0.035 17.00-19.00     ≥5*C     9.00-12.00        
1Cr18Ni11Ti 0.04-0.1 ≤1.00 ≤2.00 0.030 0.035 17.00-20.00     4*C-0.60     9.00-13.00        
0Cr18Ni11Nb ≤0.08 ≤1.00 ≤2.00 0.030 0.035 17.00-19.00           9.00-13.00        
1Cr19Ni11Nb 0.04-0.1 ≤1.00 ≤2.00 0.030 0.035 17.00-20.00           9.00-13.00        
0Cr18ni13Si4 ≤0.08 ≤1.00 ≤2.00 0.030 0.035 15.00-20.00           11.00-15.00        
0Cr18Ni12Mo2Ti ≤0.08 ≤1.00 ≤2.00 0.030 0.035 16.00-19.00 1.80-2.50   5*C-0.70     11.00-14.00        
1Cr18Ni12Mo2Ti ≤0.12 ≤1.00 ≤2.00 0.030 0.035 16.00-19.00 1.80-2.50   5*(C-0.02)-0.80     11.00-14.00        
1Cr18Ni12Mo3Ti ≤0.12 ≤1.00 ≤2.00 0.030 0.035 16.00-19.00 2.50-3.50   5*(C-0.02)-0.80     11.00-14.00        
0Cr18Ni12Mo3Ti ≤0.08 ≤1.00 ≤2.00 0.030 0.035 16.00-19.00 2.50-3.50   5*C-0.70     11.00-14.00        

Note: Grades other than the a.m. chart can be made available through consultations.

Mechanical properties
Standard Grade Tensile strength
(Mpa)
Yield point(Mpa)
not less than
Elongation(%)
not less than
Impact(J)
not less than
Hardness
not less than
GB 3087 10 335-475 205(T<16mm)
195(t≥16mm)
24 " "
20 392-588 245(T<16mm)
235(t≥16mm)
20 " "
DIN 17175 St35.8 360-480 235(T<16mm)
225(t≥16mm)
25 " "
St45.8 410-530 255(T<16mm)
245(t≥16mm)
21 " "
15Mo3 456-600 270 22 " "
13CrMo44 440-590 290 22 " "
10CrMo910 450-600 280 20 " "
14MoV63 460-610 320 20 55 "
12Cr1MoV 470-640 255 21 41 "
GB 5310 20G 410-550 245 24/22 40/27 "
25MnG 485-640 275 20/18 40/27 "
15MoG 450-600 270 22/20 40/27 "
20MoG 415-665 220 22/20 40/27 "
12CrMoG 410-560 205 21/19 40/27 "
12 Cr2MoG 450-600 280 22/20 40/27 "
12 Cr1MoVG 470-640 255 21/19 40/27 "
12Cr2MoWVTiB 540-735 345 18 40/27 "
10Cr9Mo1VNb ≥585 415 20 40 "
1Cr18Ni9 ≥520 206 35   "
1Cr19Ni11Nb ≥520 206 35   "
ASTM A106
ASME SA-106M
A106B/SA-106B ≥415 240 30 " "
A 106C/SA-106C ≥485 275 30 "  
ASTM A192
ASME SA-192M
A192/SA-192 ≥325 180 35 " 77HRB
ASTM A209
ASME SA-209M
A 209T1/SA-209 T1 ≥380 205   " 80HRB
A 209T1b/SA-209T1b ≥365 195   " 77HRB
A209T1a/SA-209T1a ≥415 220   " 81HRB
ASTM A210
ASME SA-210M
A210 A1/ SA-210A1 ≥415 255   " 79HRB
A210C/ SA-210C ≥485 275   " 89HRB
ASTM A213
ASME SA-213M
A213 T2/SA213 T2 ≥415 205   " 85HRB
A213 T11/SA213 T11 ≥415 205   " 85HRB
A213 T22/SA213 T22 ≥415 205   " 85HRB
A213 T23/SA213 T23 ≥510 400 20 " 97HRB
A213 T24/SA213 T24 ≥585 415 20 " 25HRB
A213 T91/SA213 T91 ≥585 415 20 " 25HRB
A213 T911/SA213 T911 ≥620 440 20 " 25HRB
A213 T22/SA213 T92 ≥620 440 20 " 25HRB
A213 T122/SA213 T122 ≥620 400 20   25HRB
TP304H ≥515 205 35   90HRB
TP316H ≥515 205 35   90HRB
TP321H ≥515 205 35   90HRB
TP347H ≥515 205 35   90HRB
S30432 ≥590 235 35   95HRB
TP310HCbN ≥655 295 30   100HRB
EN 10216-2 P195GH 320-440 195 27    
P235GH 360-500 235 25    
P265GH 410-570 265 23    
16Mo3 450-600 280 22    
10CrMo5-5 410-560 275 22    
13CrMo4-5 440-590 290 22    
10CrMo9-10 480-630 280 22    
X10CrMoVBb9-1 630-830 450 19 41  
JIS G 3461 STB 340 ≥340 175 35    
STB 410 ≥410 255 25    
STB 510 ≥510 295 25    
JIS G 3462 STBA 12 ≥382 175 35    
STBA 13 ≥412 255 25    
STBA 20 ≥412 295 25    
STBA 22 ≥412 206      
STBA 23 ≥412 206      
STBA 24 ≥412 206      
STBA 26 ≥412 206      
STBA 19 ≥412 206      
JIS G 3463 SUS 304HTB ≥520 206      
SUS 316HTB ≥520 206      
SUS 321HTB ≥520 206      
SUS 347HIB ≥520 206      
GB 13296 0Cr18Ni9 ≥520 205 35    
1Cr18Ni9 ≥520 205 35    
00Cr19Ni10 ≥480 175 35    
2Cr23Ni13 ≥520 205 35    
0Cr23Ni13 ≥520 205 35    
2Cr25Ni20 ≥520 205 35    
0Cr25Ni20 ≥520 205 35    
0Cr17Ni12Mo2 ≥520 205 35    
1Cr17Ni12Mo2 ≥520 205 35    
00Cr17Ni14Mo2 ≥480 175 40    
0Cr19Ni13Mo3 ≥520 205 35    
00Cr19Ni13Mo3 ≥480 175 35    
1Cr18Ni9Ti ≥520 205 40    
0Cr18Ni10Ti ≥520 205 35    
1Cr18Ni11Ti ≥520 205 35    
0Cr18Ni11Nb ≥520 205 35    
1Cr19Ni11Nb ≥520 205 35    
0Cr18ni13Si4 ≥520 205 35    
0Cr18Ni12Mo2Ti ≥530 205 35    
1Cr18Ni12Mo2Ti ≥540 215 35    
1Cr18Ni12Mo3Ti ≥530 205 35    
0Cr18Ni12Mo3Ti ≥540 215 35    

 

Boiler tubing is used in these industries

Sunny steel are instrumental in offering our clients with a wide range of Boiler Tubes that is used in varied industrial applications. We also undertake customization of these tubes to meet the specific requirements of our clients. These Boiler Tubes are known for their resistance to corrosion and tolerance for withstanding temperature variations.

Boiler tubing is used in these industries:

  • Steam Boilers
  • Power Generation
  • Fossil Fuel Plants
  • Electric Power Plants
  • Industrial Processing Plants
  • Cogeneration Facilities

Boiler tubes need to withstand high pressure and temperature.

Overview of standards and types of boiler pipes

You are looking for boiler pipes with different specifications?

DIN 17175 EN 10216-2 ASTM A335
 St 35.8, I + III   P 235 GH, 1 + 2   P5 
 15 Mo 3   16 Mo 3   P 11 
 13 CrMo 44   13 CrMo 4-5   P22 
 10 CrMo 910   10 CrMo 9-10   P9 
 X 10 CrMo VNb 9-1   X 10 CrMo VNb 9-1   P91 
 X 20 CrMo V 12-1   X 20 CrMo V 11-1 

Carbon steel for water distribution for temperature 0° - 100°C

EN - DIN  WNr AISI/ Tradename ASTM - UNS Pipe
seamless
Pipe
welded
P235TR1  1.0254 - - A/ SA53B A/ SA53B
EN10216-1 EN10217-1

Carbon steel for temperature -20° - 400°C for pressure application

EN - DIN  WNr AISI/ Tradename ASTM - UNS Pipe
seamless
Pipe
welded
P235GH  1.0345 - - A/ SA106 Gr B/ A A/ SA672 B65
EN10216-2 EN10217-2/ -5
P265GH 1.0425 - - A/ SA106 Gr C/ A A/ SA672 BB70
EN10216-2 EN10217-2/ -5
P355N/ NH 1.0562/ 1.0565 - - API 5L X52 API 5L X52
EN10216-3 EN10217-3
P460N/ NH 1.8905/ 1.8935 - - API 5L X65 API 5L X65
EN10216-3 EN10217-3

Low Alloy steel and Alloy Steel for temperature 0° to 650°C for pressure application

EN - DIN  WNr AISI/ Tradename ASTM - UNS Pipe
seamless
Pipe
welded
16Mo3 1.5415 - - A/ SA335 P1 A/ SA691 1CR
EN10216-2 EN10217-5
X11CrMo5-1 1.7362 - - A/ SA335 P5 A/ SA691 5CR
EN10216-2 EN10217-5
X11CrMo9-1 1.7386 - - A/ SA335 P9 A/ SA691 9CR
EN10216-2 EN10217-5
13CrMo4-5 1.7335 - - A/ SA335 P11 A/ SA691 1 1/4CR
EN10216-2 EN10217-5
10CrMo9-10 1.7380 - - A/ SA335 P22 A/ SA691 2 1/4CR
EN10216-2 EN10217-5
X10CrMoVNb9-1 1.4903 - - A/ SA335 P91 A/ SA691 91CR
EN10216-2 EN10217-5
X10CrWMoVNb9-2 1.4901 - - A/ SA335 P92 A/ SA691 92CR
EN10216-2 EN10217-5

Low temperature carbon steel for pressure purpose and low temp up to -50°C

EN - DIN  WNr AISI/ Tradename ASTM - UNS Pipe
seamless
Pipe
welded
P215NL 1.0451 - - A/ SA333 Gr1/ Gr6 A/ SA671CC60/70 
EN10216-4 EN10217-4
P255QL 1.0452 - - A/ SA333 Gr1/ Gr6 A/ SA671CC60/70 
EN10216-4 EN10217-4
P265NL 1.0453  - - A/ SA333 Gr1/ Gr6 A/ SA671CC60/70 
EN10216-4 EN10217-4
P355NL1/ NL2 1.0566 - - A/ SA333 Gr6 A/ SA671CC60/70
A/ SA333 Gr6 
EN10216-3 EN10217-3

Low temperature Nickel Steel for pressure purpose and low temp up to -196°C

EN - DIN  WNr AISI/ Tradename ASTM - UNS Pipe
seamless
Pipe
welded
X10Ni9/ X8Ni9 1.5682/ 1.5662 - - A/ SA333 Gr. 8 A/ SA671C100/ CH100
EN10216-4 EN10217-4
12Ni14 1.5637 - - A/ SA333 Gr3 A/ SA671CF66
EN10216-4  EN10217-4

Sunny Steel’s state-of-the-art manufacturing processes and advanced inspection and testing procedures ensure our boiler tube stand up to the harsh environments.

Boiler tube FAQs

Boiler tubes are used in fire-tube boiler, a type of boiler in which hot gases from a fire pass through one or more tubes running through a sealed container of water.

How to get rid of surface stains of cracking tube

How to get rid of surface stains of cracking tube follow the steps below:

The first step is to clean, we must first petroleum cracking tube surface oil, dirt, grease, and some other substances removed. The second step is naturally acid, generally speaking, there are two pickling treatment, a chemical treatment, another treatment method is electrolysis, which can be handled in two ways petroleum cracking tube surface cleaning clean, but chemical pickling is a pipeline anti-corrosion measures.

The third step is necessary to use the tool to the surface of the oil cracking pipe polished, although the effect may not be very good polish, but this procedure is also indispensable. The final step is to make the surface of petroleum cracking tube jet, one can remove some of the dirt, the second is to make the roughness of petroleum cracking tube more evenly.

For petroleum cracking tube defects formed on the surface there are many, but certainly there are a lot of different reasons, the specific form of the crack is different, often found defective for its appearance on petroleum cracking tube we can see, the main reason for its main form by the following points. In fact, for the production process, the emergence of various drying phenomena of its raw materials for steelmaking summer rainy season or when it will produce up to steel gas content's sake.

In the process, the ingot when heated due to heating of the air bubbles are burned through, it will have more cracks after the rolling, which will meet the petroleum cracking tube relatively thin, dense and sizes, its length ranging from cracks, these things collectively referred to as hairline, this is a defect. So the cause of the surface oil cracking tube defects are many, so we have to remedy. After oil cracking pipe handling, appearance becomes smoother, more beautiful. Although after the rust will not affect the use again, but if we do the work in advance, so do not bother it. We buy petroleum cracking tube among the first to note that it is not a strong corrosion resistance, have a longer life does not have to select a high-quality petroleum cracking pipe products that can reduce our future work a lot of trouble.

Small diameter high-pressure boiler tube surface defects that affect the quality, mainly due to waste generation.

Boiler pipes often in high temperature and high pressure work, pipe smoke and water at high temperature steam oxidation and corrosion effects will occur, thus requiring durable steel with high strength, high oxidation resistance, and good organizational stability, high pressure boiler tube in addition to chemical composition and mechanical properties, hydrostatic testing done by the root, to be flaring, flattening test. Steel to heat treatment delivery. In addition, the finished steel microstructure, grain size, there are certain requirements decarburization.

High-pressure boiler tubes are seamless steel pipe categories. Seamless same manufacturing method, but used in the manufacture of steel pipe, there are strict requirements. Often in high-pressure boiler tubes at high temperature and pressure conditions of use, the tube under the effect of high temperature gas and water vapor, oxidation and corrosion will occur. Require durable steel with high strength, high resistance to oxidation corrosion, and have good organizational stability.

High-pressure boiler tube is mainly used to manufacture high-pressure and high pressure boiler superheater tubes, reheater tubes, windpipe, the main steam pipe. High-pressure boiler tubes for low and medium pressure boiler (working pressure is generally not more than 5.88Mpa, working temperature below 450 ℃) of heating surface tubes; used for high-pressure boilers (above 9.8Mpa working pressure in general, the working temperature of 450 ℃ ~ 650 ℃ between) the heating surface tubes, economizer, superheater, reheater, petrochemical industrial pipe.

Hardness testing methods of high-pressure boiler tubes

High pressure boiler tube hardness testing should take into account its mechanical properties, which is related to stainless steel as raw material for the deformation, such as punching, cutting processing performance and quality.

Therefore, all of the high-pressure boiler tubes need to conduct mechanical tests. Mechanical performance testing method is mainly divided into two kinds, one kind is tensile test, the other kind is usually hardness test.

Tensile test is the high pressure boiler tube sample, high pressure boiler tube tend to sample to the fracture on tensile testing machine, mechanical properties and determination of one or more, usually only determination of tensile strength, yield strength, break elongation, and reduction of area. Tensile test is the most basic mechanical properties of metallic materials testing methods, almost all of the metal material, as long as the requirements of the mechanical properties of the high pressure boiler tube, the provisions of the tensile test. Especially those appearance and high pressure boiler tube is not good for the material of hardness test, tensile test became the only means of mechanical properties testing.

Steam boilers

A steam boiler is a device used to create steam by applying heat energy to water.

High Frequency Resistance Welding

A continuous helical fin is attached to the base tube by high frequency electric resistance welding in order to give an efficient and thermally reliable bond. Fins can be either solid or serrated (segmented). The weld produced in this process is a true forge, blacksmith weld. This type of weld is comprised of a fusion between two portions of parent metal without the introduction of a filler material. The weld is simply produced by heating the interfaces to be joined to a plastic state and applying pressure.

Used in boilers, furnaces and fired heaters for efficient heat recovery.

High-pressure boiler tubes are frequently occurs fault because of high temperatures, affecting the entire heating system, mainly due to an internal boiler for heat treatment is not perfect, a lot of heat can not be effectively converted and timely treatment.

High pressure boiler tube hardness testing should take into account its mechanical properties, which is related to stainless steel as raw material for the deformation, such as punching, cutting processing performance and quality.

Therefore, all of the high-pressure boiler tubes need to conduct mechanical tests. Mechanical performance testing method is mainly divided into two kinds, one kind is tensile test, the other kind is usually hardness test.

Finned tubes are used in applications involving the transfer of heat from a hot fluid to a colder fluid through a tube wall.

The rate at which such heat transfer can occur depends on three factors:

  • the temperature difference between the two fluids;
  • the heat transfer coefficient between each of the fluids and the tube wall;
  • and the surface area to which each fluid is exposed.
The basic method of rust removal

a. Cleaning

Using the solvent and emulsion to clean the surface of high pressure boiler pipe, so as to achieve the purpose of removing oil, grease, dust, lubricant and similar organic matter. But it cannot remove the dust, oxide skin, welding medicine and so on. So it is only as a supplementary method in the anti-corrosion production.

b. Tool

Tool rust removal mainly use wire brush and other tools to grind the surface of high pressure boiler pipe. It can remove loose or warping of the oxide skin, rust, welding slag and so on. Manual tool can reach SA2 level, power tool can reach SA3 level. If the iron oxide scale attached to the surface, it cannot reach the anchorage depth required by the anti-corrosion construction.

c. Acid cleaning

High pressure boiler pipe generally adopt chemical and electrolytic methods to do pickling treatment.

d. Spray rust removal

Spray rust removal cannot only remove rust, oxide and dirt completely, but also high pressure boiler pipe can achieve the required uniform roughness under the action of abrasive impact and friction force.

Spay rust removal cannot only expand the physical adsorption on the surface of high pressure boiler pipe, but also enhance the mechanical adhesion between the anti corrosion layer and the pipe surface. So spray rust removal is ideal method of rust removing for pipeline corrosion.

Boiler pipe forming include fin tube, serpentine tube and reaming welding.

Boiler tubes need take for a variety of molding in the boiler manufacture and installation process

Heat treatment methods applied in the boiler pipes

Heat treatment is a method of changing the physical properties of high pressure boiler pipe by heating and cooling. Heat treatment can improve the microstructure of high pressure boiler pipe, so as to meet the required physical requirements. Toughness, hardness and wear resistance are obtained by heat treatment. In order to obtain these characteristics, it is necessary to adopt quenching, annealing, tempering and surface hardening.

a. Quenching

Hardening, also called quenching, is that high pressure boiler pipe is heated evenly to the appropriate temperature, then quickly immerse in water or oil for rapid cooling, and cooling in the air or in the freezing zone. So that the high pressure boiler pipe can obtain the required hardness.

b. Tempering

High pressure boiler pipe will become brittle after hardening. And the stress caused by quenching can make the high pressure boiler pipe tapped and broken. The tempering method can be used to eliminate brittleness. Although the hardness of high pressure boiler pipe is lighter reduced, its the toughness can be increased to reduce the brittleness.

c. Annealing

Annealing is the method to eliminate the internal stress of high pressure boiler pipe. The annealing method is that the steel parts need to be heated to the critical temperature, then put in dry ash, lime, asbestos or closed in the furnace, then let it cooling slowly.



Seamless pipe Specification, standard and identification

Seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Seamless pipes dominates 65% of market share in Chinese boiler industry.