5/18/12 Tubing Specifications

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Common Tubing Specifications

ASMESpec.

ASMEGrade

ERW

or

Smls.

Description Typical uses

SA-178 A ERW Low carbon steel - C=0.18 max.Boiler tubes, economizers, low

temp. superheaters

SA-178 C ERW Medium carbon steel - C=0.35 max.Boiler tubes, economizers, low

temp. superheaters

SA-178 D ERW Carbon-manganese steel - C=0.27 max Not in common use

SA-192 Smls. Low carbon steel - C=0.18 maxWaterwalls, economizers, low

temp. superheaters

SA-210 A1 Smls. Medium carbon steel - C=0.27 max.Waterwalls, economizers,

superheaters

SA-210 C Smls. Medium carbon steel - C=0.35 max.Waterwalls, economizers,

superheaters

SA-209 T1 Smls. Low alloy steel - low carbon, 1/2% moly Superheaters

SA-209 T1a Smls. Low alloy steel - medium carbon, 1/2% moly Superheaters

SA-209 T1b Smls. Low alloy steel - low carbon, 1/2% moly Superheaters

SA-213 T2 Smls. Intermediate alloy - 1/2% chrome, 1/2% molyWaterwalls, superheaters, not incommon use

SA-213 T11 Smls.Intermediate alloy - 1 1/4% chrome, 1/2%moly

Waterwalls, superheaters

SA-213 T22 Smls. Intermediate alloy - 2 1/4% chrome, 1% moly Waterwalls, superheaters

SA-213 T5 Smls. Intermediate alloy - 5% chrome, 1/2% molyHigh temperature superheaters,

not in common use

SA-213 T9 Smls. Intermediate alloy - 9% chrome, 1% moly High temperature superheaters,

no longer in common use

SA-213 T91 Smls.Intermediate alloy - 9% chrome, 1% moly,

1/4% vanadium

High temperature superheaters -

the latest and greatest

SA-213 Tp-304 Smls. Stainless steel - 18% chrome, 8% nickel Superheaters

SA-213Tp-

304HSmls. Stainless steel for high temperature service High temperature superheaters

SA-213 Tp-316 Smls. Stainless steel - 16% chrome, 11% nickel Superheaters

SA-213Tp-

316HSmls. Stainless steel for high temperature service High temperature superheaters

Stainless steel - 17% chrome, 9% nickel,

5/18/12 Tubing Specifications

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SA-213 Tp-321 Smls. 0.60% titanium Superheaters

SA-213Tp-

321HSmls. Stainless steel for high temperature service High temperature superheaters

SA-213 Tp-347 Smls.Stainless steel - 17% chrome, 9% nickel,

columbium + tantalum=1.00% max.Superheaters

SA-213Tp-

347HSmls. Stainless steel for high temperature service High temperature superheaters

For boiler tubes, SA-178A is the most common, and most economical choice.

Economizers are usually made from SA-178A or SA-210-A1.

Superheater materials vary widely, with SA-178A and SA-192 used most commonly in the lower temperature

ranges. SA-210-A1,

SA-213-T11, and SA-213-T22 are commonly seen in the intermediate temperature ranges, with the stainless

grades, most

frequently Tp-304H and Tp-347H, reserved for the higher temperature superheaters, although SA-213-T91 is

increasingly specifiedfor the highest temperatures.

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Send mail to [par@scsenergy.com] with questions or comments about this web site.Last modified: April 26, 2012