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ASTM A213 T91, T12, T11 alloy pipe is a ferritic and austenitic alloy steel seamless steel pipe used in boilers, superheaters and heat exchangers.

ASTM A822 is a standard specification for seamless cold-drawn carbon steel pipes, which are mainly used in hydraulic systems and other similar applications, where the forming operation requires small radius bending and flaring.

ASTM A135 ERW steel pipe, whether grade A or B, is usually manufactured using a high-frequency resistance welding process. Welds of ERW pipe conforming to ASTM A135 Class B shall be heat treated after welding to a minimum temperature of 1000°F [540°C].

A672 Pipe specification covers electric-fusion-welded steel pipe with filler metal added, fabricated from pressure vessel quality plate of several analyses and strength levels and suitable for high-pressure service at atmospheric and lower temperatures.