DONGSHANG produce welded stainless steel tube with standard A249, A269, A270, A312, A789 many there is 304, 304L, 316L, 321 and duplex steel grade, used for many industries including General service, Curatorial Industry, Food and beverage Industry, Dorative and construct, Aerospace Industry, Chenmical and Petrochemical, Fluid transport, Water treatment, Boiler, heat exchanger, Oil and gas service, Mechanical and fabrication purpose.
- Type: welded tube
- Specification: A249, A269, A312, A554
- Grades: TP304, TP304L, TP316L
- OD: 3 – 610 mm
- WTH: 0.3 – 30 mm
- Condition: annealing, beight annealing, polishing
- Form:: round, square, rectangular, oval, U bending, coiled
- Application: heat exchanger, boiler, water, high pressure, ornamental purpose
Standards and materials as PED certificate
|Standards and specifications||Grades|
|ASME SA-312/ASME SA-312M||TP304, TP304L, TP316, TP316L, TP316Ti, TP310S, TP321|
|ASME SA-249/ASME SA-249M||TP304, TP304L, TP316, TP316L, TP316Ti, TP310S, TP321|
|ASME SA-789/ASME SA-789M
ASME SA-790/ASME SA-790M
|EN10217-7||1.4301, 1.4306, 1.4401, 1.4404, 1.4571, 1.4541|
ASTM specifications for welded stainless steel tube
- ASTM A249 – Welded Austenitic Steel Boiler, Superheater, Heat Exchanger, and Condenser Tubes
- ASTM A268 – Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing
- ASTM A269 – Seamless and Welded Stainless Steel Tubing
- ASTM A270 – Seamless and Welded Stainless Steel Sanitary Tubing
- ASTM A312 – Seamless, Welded, and Heavily Cold Worked Stainless Steel Pipes
- ASTM A358 – Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General Applications
- ASTM A554 – Welded Stainless Steel Mechanical Tubing
- ASTM A688 – Welded Stainless Steel Feedwater Heater Tubes
- ASTM A789 – Seamless and Welded Stainless Steel Tubing
- ASTM A790 – Seamless and Welded Stainless Steel Pipe
- ASTM A999 – Specification for General Requirements for alloy and Stainless Steel Pipe
Bright annealing welded stainless steel tube
In the process of production, insert hydrogen (H2) full of online furnace and stainless steel tube heated to 1050 ℃, then rapidly cooling to below 100 ℃ special equipment, Hydrogen is not an oxidising agent, so tube surface will no oxidation. there is unnecessary pickling after bright annealing.
Heat treatment is a very important stage of production process, uniform grain structure through complete solution to improve stainless steel tensile properties, stainless steel tube can been further processed by users such as bending and form.
DONGSHANG STAINLESS’s suppliers are best in China, Such as BAOSTEEL, TISCO, POSCO, produced and testing complying with standard to ensure our products 100% high quanlity.