ASME Specifications 3

SA-226*
Covers electric-resistance-welded carbon steel boiler and superheater tubes for highpressure service. The tubing sizes and thicknesses usually furnished to this specification are ½ in. to 5 in. O.D. and 0.085 in. to 0.360 in. ,inclusive in minimum wall thickness.

SA-234**
Covers wrought carbon steel and alloy steel fittings of seamless and welded construction for use in pressure piping and in pressure vessel fabrication for service at moderate and elevated temperatures. The term ”fitting” applies to butt-welding, socket-end, and threaded end parts such as 45-deg and 90 deg elbows. 180-deg return bends, caps, tees,reducers, lap-joint stub ends, and other types as covered by the latest revision of ANSI B16.9, MSS SP48, and ANSI B16.11.

SA-249*

Covers welded tubes made from the austenitic steels with various grades intended for such use as boiler, superheater, heat exchanger, or condenser tubes. Grades TP 304H, TP 316H,TP 321 H,TP 347H, and TP 348H are modifications of grades TP 304, TP 316, TP 321., TP 347, and TP 348. and are intended for high-temperature Service such as for superheaters and reheaters. The tubing sizes and thickness usually furnished to this specification are 1/8 in. in inside diameter to 5 in. in outside diameter and 0.015 in. to 0.320 In., incl. in minimum wall thickness.

SA-250**
Covers several grades, designated T 1, T 1a. T lb. of electric-resistance-welded, carbon-molybdenum alloy-steel boiler and super heater tubes. The tubing sizes and thicknesses usually furnished to this specification are T/2 in. to 5 in. O.D. and 0.035 in. to 0.320 in., inclusive in minimum wall thickness.

SA-268**
Covers nine grades of stainless steel tubing for general corrosion-resisting and high-temperature service. These grades are commonly known as the “straightchromium” types and are characterized by being ferro-magnetic. Two of these grades, TP 410 and TP 329 (Table 1). are amenable to hardening by heat treatment, and the high- chromium. ferritic alloys are sensitive to notch-brittle ness on slow cooling to ordinary temperatures. These features should be recognized in the use of these materials. Grade 409 may be ordered with no final heat treatment provided the purchase order so specifies and the material meets all of the other requirements of the specifications.

SA-312**
Covers seamless and welded austenitic steel pipe intended for high-temperature and general corrosive service. Sixteen grades are covered. Grades TP 304H,TP 316H, TP 321H, TP 347H and TP 387H are modification of Grades TP 304, TP 316, TP 321, TP347 and TP 387, and are intended for hightemperature service.

SA-333**
Covers nominal (average) wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures, Several grades of ferritic steel are included. Some product sizes may not be available under this specification because heavier wall thicknesses have an adverse affect on low-temperature impact properties

SA-334* Covers several grades of seamless and welded carbon and alloy-steel tubes intended for use at low temperatures. Some product sizes may not be available under this specification because heavier wall thicknesses have an adverse effect on lowtemperature impact properties.

*Identical with ASTM Specifications
**Identical with ASTM Specifications with revisions or additions

Independent Pipe and Supply Corp