Stainless steel contains chromium which provides the properties of corrosion resistance at high temperatures. Stainless steel can withstand corrosive or chemical environments due to its smooth surface. Stainless steel products are safe for long-term use with excellent resistance of corrosion fatigue.
Stainless Pipes are made from more than 20 steel grades of various corrosion resistance and are intended for application in conditions of a wide range of corrosion environments and temperatures in heat exchanger.
Large size SS 304 stainless pipe 
Bright annealing tube 
Large size SS 304 stainless pipe 
Large size SS 304 stainless pipe
The general features of our DSSP: superior corrision resistance, such as pitting corrosion, crevice corrosion, abrasion corrosion; better weldability and mechanical properties; excellent intergranular corrosion resistance and better cost- effectiveness.
Stainless steel can withstand corrosive or chemical environments due to its smooth surface.
NPS: 1/8″ through 24″
Schedules: 5, 10, 10S, 20, 30, 40, 40S, 80, 80S
Specifications: ASTM A312, ASME SA312
A wide range of effective production facilities offers you a large number of possibilities:
- Corrosion resistant pipes with outer diameters from 15 to 2 032 mm (80 inch) and wall thicknesses up to 70 mm
- Pipes are made from special alloys, titanium or clad materials
- Pipes with demanding tolerance requirements
- Pipes in special geometric shapes
- Pipes according to internationally valid standards, including DIN, DIN EN, DIN EN ISO, NORSOK, API and ASTM
Product Specification and Size :
Available Specification
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Product Name
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Executive
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Dimension
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Steel Code / Steel Grade
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Industrial Pipes
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ASTM A312, A358, A778
JIS G3459 |
OD: 1/4″~40″
WT: SCH5S~SCH80S |
TP304, TP304L, TP316L
SUS304TP |
|
Tubes for Boiler and Heat-Exchanger, General Service Tubing
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ASTM A249, A269
JIS G3463 |
OD: 15.9~139.8mm
WT: 1.6~5.0mm |
TP304, TP304L, TP316L |
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Mechanical and Structural Tubes
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ASTM A554
JIS G3446 |
OD: 7.9~152.4mm
WT: 0.5~6.5mm |
MT304, MT304L, MT316L, MT430
Grade 201, 202 as per mill’s STD SUS304 |
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Square Tubes
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ASTM A554
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OD: 12.7×12.7~150x150mm
WT: 0.7~6.5mm |
MT304, MT304L, MT316L,MT430
Grade 201, 202 as per mill’s STD |
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Rectangular Tubes
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ASTM A554
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OD: 10×20~100x200mm
WT: 0.7~6.5mm |
MT304, MT304L, MT316L,MT430
Grade 201, 202 as per mill’s STD |
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Sanitary Tubing
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ASTM A270
JIS G3447 |
OD: 25.4~165.2mm
WT: 0.8~3.05mm |
TP304, TP304L, TP316L
SUS304TBS |
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Large Gauge Pipes for Ordinary Piping
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JIS G3448
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OD: 15.88~318.5mm
WT: 0.8~3.0mm |
SUS304TPD
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Large Diameter Pipes
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JIS G3468
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OD: 14″~40″
WT: SCH5S~SCH40S |
SUS304TPY
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Inspection & Quality Control:
With a complete set of advanced testing equipment, we have the following Regular Testing Items:
- Chemical Composition Analyzing;
- Metallographic Test ;
- Mechanical Properties Test;
- Hydraulic Test;
- Non-destructive Test, including X-Ray Flaw Detection;
- Dimensional Checking;
Flattening
Flare & Flange
Reverse Bend
Reverse Flattening
Tensile Strength
Hardness
Application
Stainless steel pipe (tube) has excellent characteristics of corrosion resistance and smooth finishing. Stainless steel pipe (tube) is commonly used in demanding equipment like automobiles, food processing, water treatment facilities, oil and gas processing, refinery and petrochemicals, breweries and energy industries.
- Machinery Parts
- Pharmaceutical
- Biotechnology
- Automotive
- Oil and Gas
- Marine
- Food and Beverage Processing
- Construction
- Automotive industries
- Food processing
- Water treatment facilities
- Breweries and energy industries
Chemical Composition & Mechanical Property
Chemical Composition (For Reference)
| Steel Grade | C% Max. | Si% Max. | Mn% Max. | P% Max. | S% Max. | Cr% Max. | Ni% Max. | Mo% Max. | Ti% Max. | Other |
| SUS201 | 0.15 | 1.0 | 5.5~7.5 | 0.06 | 0.03 | 16.0~18.0 | 3.5~5.5 | – | – | N: 0.25 |
| SUS202 | 0.15 | 1.0 | 7.5~10.0 | 0.06 | 0.03 | 17.0~19.0 | 4.0~6.0 | – | – | N: 0.25 |
| SUS304 | 0.08 | 1.0 | 2.0 | 0.045 | 0.03 | 18.0~20.0 | 8.0~10.5 | – | – | – |
| SUS304L | 0.03 | 1.0 | 2.0 | 0.045 | 0.03 | 18.0~20.0 | 9.0~13.0 | – | – | – |
| SUS316L | 0.03 | 1.0 | 2.0 | 0.045 | 0.03 | 16.0~18.0 | 12.0~15.0 | 2.0~3.0 | – | – |
| SUS430 | 0.12 | 0.75 | 1.0 | 0.04 | 0.03 | 16.0~18.0 | 0.60 | – | – | – |
Mechanical Property (For Reference)
| Steel Grade | N/mm 2 MIN. Tensile Stress |
N/mm 2 MIN. Proof Stress |
% MIN. Elongation |
HRB MAX. Hardness |
Bendability: Bending Angle |
Bendability: Inside Radius |
| SUS201 | 520 | 275 | 40 | 100 | No Require | – |
| SUS202 | 520 | 275 | 40 | 95 | No Require | – |
| SUS304 | 520 | 205 | 40 | 90 | No Require | – |
| SUS304L | 480 | 175 | 40 | 90 | No Require | – |
| SUS316L | 480 | 175 | 40 | 90 | No Require | – |
| SUS430 | 420 | 205 | 22 | 88 | 180° | 1.0 time the thickness |
Welded Tube Standard Specifications
| Specifications | Tube Pipe Type | Material | Applications |
|---|---|---|---|
| ASTM A249 | Welded | Austenitic Steel | Boiler, Superheater, Heat Exchanger, And Condenser |
| ASTM A268 | Seamless And Welded | Ferritic And Martensitic Stainless Steel | General Service |
| ASTM A269 | Seamless And Welded | Austenitic Stainless Steel | General Service |
| ASTM A270 | Seamless And Welded | Austenitic And Ferritic / Austenitic Stainless Steel | Sanitary Tubing |
| ASTM A312 | Seamless, Welded, And Heavily Cold Worked | Austenitic Stainless Steel | High-Temperature And General Corrosive Service |
| ASTM A358 | Welded | Austenitic Chromium-Nickel Stainless Steel | High-Temperature Service And General Applications |
| ASTM A554 | Welded | Stainless Steel | Mechanical Tubing |
| ASTM A688 | Seamless And Welded | Austenitic Stainless Steel | Feedwater Heater |
| ASTM A789 | Seamless And Welded | Ferritic/Austenitic Stainless Steel | General Service |
| ASTM A790 | Seamless And Welded | Ferritic/Austenitic Stainless Steel | General Service |
| EN 10217-7 | Welded | Stainless Steel | Pressure And Corrosion Purpose |
| EN 10312 | Welded | Stainless Steel | Water And Other Liquids |
Additional mechanical or physical properties may also need to be considered to achieve the overall service performance requirements.
Welding Methods
Welded stainless steel tube is made from long strip or sheet, passed a rolling machine, then the strip edges is welded longitudinally and melt together, using various welding processes, making welding beam is as same as base metal, and form into tube shape.
The sheet width is desired tube outside diameter, the width should be calculated before manufacturing.
TIG
Tungsten Inert Gas welding, another name for Gas tungsten arc welding (GTAW), is an arc welding process that uses a non-consumable tungsten electrode to produce the weld. The weld area and electrode is protected from oxidation or other atmospheric contamination by an inert shielding gas.
EFW
Electric Fusion Welding, Electric Fusion Welding (EFW steel pipe) refers to an electron beam welding, the use of high-speed movement of the electron beam directed impact kinetic energy is converted to heat the workpiece so that the workpiece leaving the melt, the formation of the weld. It is mainly used for welding dissimilar steel welding sheet or which high power density, metal weldment can rapidly heated to high temperatures, which can melt any refractory metals and alloys.
ERW
Electric Resistance Welding, high-frequency electrical current is passed between the material edges, then the edges are forced together under pressure as a butt joint and then welded by heating the material to high temperatures.
DSAW
Double Submerged arc welded, similar to other pipe manufacturing processes, the manufacture of Double Submerged Arc Welded Pipe involves first forming steel plates into cylindrical shapes. The edges of the rolled plate are formed so that V-shaped grooves are formed on the interior and exterior surfaces at the location of the seam. The pipe seam is then welded by a single pass of an arc welder on the interior and exterior surfaces.
LSAW
Longitudinal Submerge-arc Welded, LSAW (Longitudinally Submerged Arc Welded Steel pipes) in leaflets plate as raw material, the steel plate in the mold or molding machine pressure (volume) into using double-sided submerged arc welding and flaring from production.
HFW
High Frequency Welding, HFW welded steel pipes are widely preferred in Oil, Natural Gas, Water and other liquids transportation and distribution lines, heating, cooling, ventilation piping and steel structures for construction and other general purposes by means of precise production tolerances and high capacity manufacturing method.
Heat treatment is generally required after manufacture, this process improves stainless steel welded tube properties, help welded tube suitable for wide applications.