ASTM Stainless Steel Welded Tubing

Introduction
Stainless steel tube is the star product. Ganyeah Holding Group is specialized in the manufacture of ASTM Stainless Steel Welded Tubing with high quality!

Standard:

AISI, ASTM, DIN, EN, GB and JIS
ASTM A312, ASTM A249, ASTM A269 and ASTM A790

Materials:

300series:304,304L,309,309s,310,310S,316,316L,316Ti,317L,321,347,
Duplex stainless steel:S22053,S25073,S22253,S31803,S32205,S32304;2205,2507

Special Stainless Steel:904l,347,347h,317,317l

Production process:
Outer diameter: 12.7 to 3000mm, 1/2'' to 118''
Wall Thickness: 0.5 to 50mm
Length: 1~12 meters or customized

Type:
welded

Packing: 
Plastic poly-bag, woven bags, wooden case 
All our products are packed, stored, transported   according to the international regulation.
The tubes are  wrapped with seaworthy packing. Identification  labels are tagged according to standard specification or customer's instructions.
Special  packing is available as per customer's requirement.Ply wooden box are available for special protection. Other kinds of packing can be offered if request.

Application
Stainless steel tubes usually applied in motor,construction, oil, medicine, food, paper, machinery, washing machine ,chemicals, food containers and other industries.seawater environment,petrochemical,fertilizer, oil refining, oil and natural gas, light/food, paper pulp and making paper, energy and environmental-protection industry

ASTM Stainless Steel Welded Tubing As-welded (AW) tube

Decorative and Structural tube
This tubing is produced direct off the continuous tube welding mill, using cold rolled stainless steel strip made to ASTM standards, with tube produced to commercial limits of straightness in standard or specific customer lengths. AW tube has a higher yield point than annealed tube and is generally used for decorative applications or in mildly corrosive conditions. It is not suitable for applications requiring significant flaring, expanding or bending.

Manufacturing specification: ASTM A554.

Food quality tube
This tube at the point of manufacture goes through a process where the internal weld bead is rolled. The result is an improved internal finish along the weld, reducing the chance of a crevice where liquid or food product may be trapped. This assists with 'clean in place' (CIP) environment food and beverage process lines or other applications such as the pharmaceutical industry.

Manufacturing specification: ASTM 1528.

As-welded annealed (AWA) tube
This tube is produced by the same process as AW tube but is annealed to relieve stresses and improve ductility. Bright annealing is carried out in a controlled-atmosphere furnace, so that no oxide or scale is formed on the surface.

Annealing both increases the corrosion resistance and softens the tube which allows severe manipulation such as bending, expanding and forming.

Manufacturing specification: ASTM A269.

Cold worked annealed (CWA) tube
This tube is typically destined for heat exchanger applications and is produced in a similar way to AWA product except that the internal bead is rolled flush with the inside tube surface prior to annealing.

Manufacturing specification: ASTM A249M.

Cold drawn welded (CDW) and cold drawn welded annealed (CDWA) tube
 The tube is produced by drawing through a hardened steel or tungsten carbide die, at room temperature. The purpose of cold drawing is to reduce the OD or wall or both, to produce a smooth surface finish and to break up the weld structure, which results in recrystallisation when annealed.

Through cold drawing tube in the AW and AWA conditions, fine dimensional tolerances are achieved, with excellent uniformity of wall thickness and concentricity, grain structure and hardness.

Manufacturing specification: ASTM A249M.

Cold drawn seamless (CDS) tube
This tube is produced by drawing from hollow billets. It is usually supplied in the annealed and pickled condition and used where service conditions involve high pressure and corrosive conditions and where good surface finish and close tolerances are required, e.g. heat exchanger and condenser tubing, instrumentation tubing and some refinery applications.

Manufacturing specification: ASTM A269 for general service ASTM A213M for heat exchanger service.

Spiral welded tube
This tube is produced by the helical forming and automatic welding of a continuous strip of stainless steel.

Typical applications include water and pulp in paper mills, product and effluent lines in chemical processing, water lines for brewing, dust fume extraction, furnace and boiler flues, stormwater down-pipes in high-rise applications and ventilation ducts and condensation lines for air conditioning.

Manufacturing specification: generally to ASTM A778, except for mechanical properties.