ASME SA213/ASTM A213 Seamless Ferrite And Austenitic Alloy Steel Tubes for Boiler, Superheater and Heat Exchanger

Delivery condition:

The tubes shall be supplied in one of the following delivery conditions

a) Cold finished/hard (cold finished as drawn): BK;

b) Cold finished/soft (lightly cold worked): BKW

c) Annealed: GBK

d) Annealed (including de-scaling): GZF;

e) Normalized: NBK

f) Normalized (including de-scaling): NZF.

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