Place of Origin: | Zhejiang, China (Mainland) |
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1/2'' - 80'' Stainless Steel Pipe Fittings Seamless Short Radius 90 Degree Elbow
This specification covers wrought stainless steel fittings for pressure piping applications.
Several grades of austenitic stainless steel alloys are included in this specification. Grades are designated with a prefix, based on the applicable ASTM/ASME or MSS standards. For each of the WP stainless grades, several classes of fittings are specified, to indicate whether seamless or welded construction was utilized. Class designations are also utilized to indicate the nondestructive test method and extent of nondestructive examination. A general summary of the fitting classes applicable to all WP grades of stainless steel follows. There are no classes for the CR grades.
Fitting Classes for WP Grades:
CR | Corrosion resistant grade. S through WU Classes do not apply. |
WP-S | Seamless |
WP-W | Welded, RT or UT all pipe starting material welds made with filler metal. All fitting manufacturer welds except as excluded in A/SA403 paragraph 5.4.3. If UT is substituted for RT, all welds must be examined 100% for their length as required by A/SA403 paragraph 5.6 |
WP-WX | RT all welds with or without filler metal. |
WP-WU | UT all welds with or without filler metal. |
WPgrade-grade-class | Insert grades (304-304L) and class (S,W,WX, or WU). Applies to fittings meeting all chemical and physical requirements of both grades. |
Stainless Steel Butt Weld Fittings ASTM A403:
Trade Name
|
Grade
|
UNS #
|
Buttweld Fitings
|
304 |
WP304
|
S30400
|
A403* / SA403*
|
304L |
WP304L
|
S30403
|
A403* / SA403*
|
304H |
WP304H
|
S30409
|
A403* / SA403*
|
|
|
|
|
316 |
WP316
|
S31600
|
A403* / SA403*
|
316L |
WP316L
|
S31603
|
A403* / SA403*
|
316H |
WP316H
|
S31609
|
A403* / SA403*
|