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Seamless Pipe

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Standard ASME

Detailed Product Description


Seamless Pipe

Seamless & Welded Pipe From Plates as per ASTM A-358
Introduction
and Scope

This cover electric - fusion welded austenitic Chromium-nickel stainless steel pipe suitable for corrosive or high temperature service, both. Five classes of pipe are covered under this specification:

Class 1: Double side welded using filler material and 100% radio graphed.
Class 2: Double side welded using filler material. No radiography required.
Class 3: Single side welding using filler material and 100% radio graphed.
Class 4: As class 3, expert root pass may be made without filler.
Class 5: Double side welded using filler material and spot radio graphed.

Materials
This specification covers 19 grades of material steel. The plate material comply with the requirements of ASTM A - 240. Most commonly manufactured grades are 304, 304L, 304H, 316, 316L 310.
Size Range
OD: 8" NB (219.08 mm) to 36"NB (914.04 mm)
Thickness: NB Size in Schedule 5, 10, 10s, 40, 40s
Length: As per customer specification.
Process Of Manufacture
The pipes are manufacutred from levelled plates which are edge bevelled and progessively "O" formed on hydraulic presses. The edges of the pipe are either manually TIG welded or continuously welded on Track and Boom. Weld portion is radiographed as per requirements. Annealing of pipe is carried out on continuous furnace. Pipe is further straightened, sized, end finished, pressure tested, pickled and passivated, marked and packed.
Tolerances
OD: +/- 0.5% of specified diameter based on circumferential measurement.

Thickness: Minimum thickness at any point not more than 0.3 mm under nominal Thick.

Out of roundness: Difference between maximum & minimum OD%
Straightness: 3 mm in 3 mtrs.
Length: As per customeer specification.

Test
Transverse bend weld tests.
Transverse tension test to ASME code IX para QW 150.
Hydrostatic Test ASTM A-530.
Radiographic classes1,3,4 to ASME Code VIII para UW 51,
Class 5 to ASME.
Sec. VIII para UW 52.
Marking
All pipes are marked as folows:
SCORODITE, ASTM A-358, Class, Grade, Size , Schedule No., Heat No.

Seamless Pipe Seamless Pipe

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M.M. METALS
[India]
[Verified Member]

City: Mumbai
Province/State: Maharashtra
Country/Region : India

Business Type:Buying Office

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