Welded Pipe | Welded Tube |Stainless Steel Welded Tube

We can supply ASTM A249 ASTM A312 ASTM A358 ASTM A778 Stainless Steel Welded Tube. ASME SA 249 SA 312 SA 358 Welded Stainless Steel Pipe

Application of Stainless Steel Welded Tubes

Used for low pressure liquid delivery, such as water, gas, and oil. General, Hydraulic System, Constructural, Decorative/Ornamental

Tube Ends

Square ends (straight cut, saw cut, and torch cut). or beveled for welding, beveled,

Package of Welded Stainless Steel Pipe

In Plywood Cases. Plastic plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleessve, and sackcloth with several steel strips, Plastic caps.

Testing Terms of Welded Stainless Steel Pipe

Chemical Component Analysis, PMI
Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation),
Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test.

Mill Test Certificate: EN 10204 3.1 and EN 10204 3.2
Third party inspection: SGS, BV, Lloyds etc.

TIG Welding Stainless Steel Tube

We manufacture ASTM A249 stainless steel welded tube using TIG (Tungsten Inert Gas) welding method, TIG welding can protect tube surface from oxidation, making welding bead integrity with base metal, and the same level, argon tungsten-arc welding usually is used for thin wall thickness stainless steel tube, and this welding type stainless steel tubes are suitable for heat exchanger system.

Annealed Pickling Stainless Steel Welded Tube

ASTM A249 welded tube should be annealed solution after welding, general Austenitic stainless steel heat treatment temperature from 1040 to 1150 degree Celsius, different grades have different annealing temperatures, this process can remove oxidation scale, plain grain structure and relieve stress, making tube soft and easy to fabricate, after annealing, ss tubes should be pickling in mixture of acid, removing scale and cleaning the surface, then passivation condition form a layer of oxidation film protecting tubes.

Bright Annealing Stainless Steel Welded Tube

Bright annealing (BA) finish is an another surface condition, it improve tube surface bright level and make surface more clean, a perfect additional requirement beside annealing passivation finishing.

Welded Stainless Steel Pipe Specification

ASTM A53 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
ASTM A249/A249M Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
ASTM A252 Standard Specification for Welded and Seamless Steel Pipe Piles
ASTM A269/A269M Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service
ASTM A270/A270M Standard Specification for Seamless and Welded Austenitic and Ferritic/Austenitic Stainless Steel Sanitary Tubing
ASTM A270/A270M Standard Specification for Seamless and Welded Austenitic and Ferritic/Austenitic Stainless Steel Sanitary Tubing
ASTM A312/A312M Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic
ASTM A358/A358M Standard Specification for Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General Applications
ASTM A554 – 16 Standard Specification for Welded Stainless Steel Mechanical Tubing
ASTM A790/A790M Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
ASTM A928/A928M Standard Specification for Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal
ASTM A1016/A1016M Standard Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes
ISO : 1978-1982 Steel tubes for use in transportation of oil gas & Petroleum products
BS: 1387 Steel Tubes for use for Water, Gas, Air and Steam
DIN 2458 Welded Steel Pipe and Tubes
EN 10217 – 7 Welded steel tubes for pressure purposes. Technical delivery conditions. Non-alloy steel tubes with specified room temperature properties
ASTMA312/A312M，ASTMA269，ASTMA511，JISG3463，JIS3446，JIS3448，JIS3459, DIN2462，DIN17458
EN 10217-7 1.4162 1.4462 1.4362 1.4410 1.4501 Welded Stainless Steel Pipes
EN 10217-7 1.4301 1.4307 1.4948 1.4541 1.4878 1.4550 1.4401 1.4405 1.4571 1.4438 1.4439 1.4833 1.4845 Welded Steel Tubes for Pressure Purposes
Welded Steel Pipe Coating Standard: ANSI/AWWA C104/A21.4 American National Standard for Cement-Mortar Lining for Ductile-Iron Pipe and Fittings for Water ISO 21809 Petroleum and natural gas industries — External coatings for buried or submerged pipelines used in pipeline transportation systems DIN 30670 Polyethylen coatings of steel pipes and fittings

Welded-Stainless-Steel-Tubes-Production-Line

Welded Steel Pipe Process

TIG – tungsten inert gas welding, used for water piping, gas supply pipes and and pipes for the food industry
MIG – metal inert gas welding.
PAW – plasma arc welding.
ERW (Electric Resistance Welded)
HFI (High Frequency Induction)
EFW (Electric Fusion Welded Tube)
LSAW (Longitudinal Submerge-arc Welded) UO(UOE)、RB(RBE)、JCO(JCOE)
DSAW (Double Submerged arc welded)
SAW (Spiral Welded)
SSAW (Spiral Submerged-arc Welded)
ERW HFI , EFW, LSAW, DSAW

Welded Steel Pipe Size

ERW Electric resistance welding, HFI, EFW:
Outer Diameter: 6mm-610mm (1/16″-24″)
Wall Thickness: 0.3mm-22mm
Length: 0.5mtr-20mtr

LSAW, DSAW:
Outer Diameter: 219mm-1820mm
Wall Thickness: 5.0mm-50mm
Length: 6mtr-18mtr

SAW Submerged arc welding, SSAW:
Outer Diamter: 219.1mm – 4064mm (8″ – 160″)
Wall Thickness: 3.2 mm – 40mm
Length: 6mtr-18mtr