|
|
| Home | About Us | Product | Know How | Contact Us | |
 |
|
| ASTM A949 / A949M Standard Specification for Spray-Formed Seamless Ferritic/Austenitic Stainless Steel Pipe | |
| This specification covers spray-formed seamless ferritic/austenitic stainless steel pipe intended for general corrosive service, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures. The steel shall be made by the electric-furnace process and the pipe shall be made by the spray forming process using the melt from the primary melting. The as spray formed tubes shall be machined on both the inner and outer surfaces. All pipes shall be furnished in the heat-treated and descaled conditions. These pipes shall be free of contaminating iron particles. The specimens shall undergo transverse or longitudinal tension test, flattening test and hydrostatic test. | |
| 1. Scope | |
1.1 This specification covers spray-formed seamless ferritic/austenitic stainless steel pipe intended for general corrosive service, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures. 1.2 Optional supplementary requirements are provided for pipe where a greater degree of testing is desired. These supplementary requirements call for additional tests to be made and when desired, one or more of these may be specified in the order. 1.3 Appendix X1 of this specification lists the dimensions of seamless stainless steel pipe as shown in ANSI B 36.19. Pipe having other dimensions may be furnished provided such pipe complies with all other requirements of this specification. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.4.1 Within the text, the SI units are shown in brackets. 1.4.2 The inch-pound units shall apply unless the “M” designation of this specification is specified in the order. Note 1—The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as “nominal diameter,” “size,” and “nominal size.” |
|
| 2. Referenced Documents | |
ASTM Standards A450/A450M Specification for General Requirements for Carbon and Low Alloy Steel Tubes ANSI/ASME Standards B 1.20.1 Pipe Threads, General Purpose Other Standard SAE J1086 Practice for Numbering Metals and Alloys (UNS) |
|
| Keywords | |
| Austenitic-Ferritic Stainless Steel - Corrosive Service Applications - Duplex And Super Duplex Stainless Steel - Embrittlement - Seamless Pipes And Tubes - Seamless Stainless Steel Pipes - Stress Corrosion Cracking | |
Download this standard, please visit |
|
 |
|
| Home | About Us | Product | Know How | Contact Us | |