ASTM Standards::} 70 Test Methods and Definitions for Mechanical Testing of Steel Products. 3. Terminology. Definitions—For definitions of terms used. Chemical and mechanical properties of ASTM A duplex and super-duplex pipe materials. What is duplex steel, use cases, corrosion resistance vs. SS. ASTM A/AM: Standard Specification for Seamless and Welded Ferritic/ Austenitic Stainless Steel Pipe.

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Short lengths are acceptable and the number and minimum length shall be agreed upon between the manufacturer and the purchaser. Technically, then, tool and stainless steels are alloy steels however, ASTM A Austenitic Duplex Stainless Steel Seamless Pipes is reserved for those steels that contain a modest amount of alloying elements and that usually depend on thermal treatment to develop specific properties. But all pipe tested since the last acceptable standardization must be retested for acceptance.

Current edition approved Apr. It is also used by storage and transportation units of industries. The methods used for cleaning and preparing the surfaces for examination shall not be detrimental to the base metal or the surface nish. The width of the notch shall not exceed twice the depth. A lot of pipe shall consist of the following number of lengths of the same size and wall thickness from any one heat of steel: This applies only to pipe over NPS 8.

Tension test s, hardening tests, flattening tests, hydrostatic test and nondestructive electric tests shall be made to conform to the specified requirements. The dimensions of these standards should not be construed as the minimum size imperfection detectable by such equipment. The pipe shall be made by the seamless or an automatic welding process, with no addition of filler metal in the welding operation. Within the text, the SI units are shown in brackets.

Extraneous signals caused by identiable causes such as dings, scratches, dents, straightener marks, and so forth shall not be considered noise. To be accepted, retested pipe shall meet the test requirement.


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If a specimen from any length of pipe fails because of a lack of soundness that length shall be rejected, unless subsequent retesting indicates that the remaining length is sound.

Markings on the Pipe The full identification of the pipe should be continuously marked down a7990 whole length, including:. Work Item s – proposed revisions of this standard.

Cold-worked welded austenitic pipe for high temperature and general corrosive service. The values stated in each system are not exact equivalents; therefore, xstm system must be used independently of the other. Typically only pipe up to 8 inch is produced to this specification.

Combining values from the two systems may result in nonconformance with the specication. The dimensionless designator Nominal Pipe Size nominal pipe size has been substituted in this standard for such traditional terms as nominal diameter, size, and nominal size.

It appears that you have disabled your Javascript. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.

Pipe shall be double welded a90 processes employing filler metal in all passes and shall be spot radiographed. Duplex Steel and Pipe.

Seamless austenitic pipe for high temperature applications.

These pipes may be repaired per Sections 12 and Your comments are invited either for revision of this standard z790 for additional standards and should be addressed to ASTM International Headquarters.

This exotic alloy is used in oil and gas exploration, chemical processing industries also make use of this alloy. Unless specically called out by the purchaser, the selection of the nondestructive electric test will be at the option of the manufacturer. Duplex Steel Sheet Plates Asfm 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.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.


Other 4 nondestructive tests may be applied to the end areas, subject to agreement between the purchaser and the manufacturer. UNS s Pipes Tubes. The ductility of the weld shall be considered acceptable when there aastm no evidence of cracks in the weld or between the weld and the base metal after bending.

If a specimen from any length shows objectionable defects, the length shall be rejected, subject to removal of the defective end and subsequent retests indicating the remainder of the length to be sound and qstm uniform material.

ASTM A790 Standard for Duplex Stainless Steel Pipe

Specialist in Valves, Flanges, Pipes, Tubes duplex ball valves supplier. Pipe shall be double welded by processes employing filler metal in all passes and shall be completely radiographed. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

Transverse Tension Tests S2. Thus, even third party inspection consolidates our claims about superior quality. If specied in the purchase order, the marking for pipe larger than NPS 4 shall include the weight. The inch-pound units shall apply unless the M designation of this specification is specified in the order. Link to Active This link will always route to the current Active version of the standard. Pipe having other dimensions may be furnished provided such pipe complies with all other requirements of this specication.

We at Ganpat Industrial Corporation ensure that all our materials go through strict quality tests before dispatching them to our clients.

ASTM A790 Seamless and Welded Pipe

Link to Active This link will always route to the current Active version of the standard. This requirement does not preclude additional testing at earlier stages in the processing. Optional adtm requirements are provided for pipe when a greater degree of testing is desired.