Equivalent Material for Fittings, Flanges, Plates
Pipe fittings standard: ASTM A234 WP22
Flange Standard: ASTM A182 F22
Steel Plate Standard: ASTM A387 Grade 22/ ASME SA387 Grade 22
Welded pipe standard: ASTM A691 2-1/4 CR
P22 pipe material has high toughness and high wear and tear resistance, it could be used to manufacture pipe fittings like elbow, tee, reducers in ASTM A234 WP22 chrome moly pipe fittings.
ASTM A335 Standard Specification
ASTM A335 specificaton covers nominal wall and minimum wall seamless ferritc alloy-steel pipe intended for high-temperature services. The pipe ordered to this specification shall be suitable for bending, flanging (vanstoning), and similar formtion operations, and for fusion welding. Selection will depend upon design, mechnical properties, service conditions and high-temperature characteristics.
Ferritic steels in this specification are defined as low-and intermediate-alloy steels containing up to and including 10% chromium.
Referred standards for making ASTM A335 P22 Pipe
a. ASTM A999/ A999M, Standard specification for common requirements for stainless and alloy steel pipe
b. ASTM A92, Hardness test methods for steel materials
c. E213, Instructions and practice for ultra sonic testing of steel pipe and tube
d. E309 Eddy-Current Examniation methods for steel pipe products
e, E381, Inspection methods for steel bars, beams, profiles, billets and forgings.
f, E527, Numbering metals and alloys practices
g, E570, Instructions for flux leakage examniation of ferromagnetic steel pipe products
Dimension standard: ASME B36.10M
Manufacturing process: Hot finished or Cold drawn
Heat treatment methods:
Full or isothermal anneal or normalize and temper or subcritical anneal
Normalize and temper
Tests
Tensile tests: Transverse and Longitudinal
Flattening test
Hardness test
Bend Test
ASTM A335 P11, P22 – Common Use Grade
ASTM A335 P11 and P22 are most common use in Chrome Moly Alloy Pipes for high temperature environment, for power industry and petro-chemical plants.
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