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Stainless Steel Welded Pipes :-

Piping ASTM

S.S. Piping to ASTM A-312 (Welded)

Introduction and Scope -

This cover straight seam welded (without the addition of filler metal) austenitic stainless steel pipe intended for high temperature and general corrosive services.

Materials - 

Material is ordered with the requirements of ASTM A-240 in 340, 340L, 316 & 316L grades regularly. Special grades can be made as per Customer's requirements.

Size Range

• OD: 3/8" NB (17.2mm) to 8" NB (219.1mm)

• Thickness: NB size in schedule 5, 10S & 40S

• Length: As per Customer requirement.

Process Of Manufacture -

The pipe is manufactured from annealed strips on modern continous forming mills with TIG welding process under intert gas atmosphere. All pipes are annealed at a minimum temperature of 1050º C, straightened, pickled and passivated, end finished & 100 % tested in accordance with ASTM A-530.

Tolerances

Thickness: + or - 12.5% to the nominal wall thickness.

Length: - 0 / + 6 mm

Test -

Normal: Tensile strength / Yield strenght / Elongation

• Flattening
• Hydrostatic Pressure test

Optional: Pneumatic / Air leakage

• Eddy Current
• IG Corrosion

Marking: All pipes are marked as folows: Bhandari,ASTM A-312 , Grade, Nominal size ,Schedule No, Heat No.

Due to variations between different specifications comparisons made exactly, physical, chemical and mechanical values are also typical and should not be taken as being accurate.