ASTM A790 PDF

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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The dimensionless designator NPS nominal pipe size has been substituted in this standard for such traditional terms as nominal diameter, size, and nominal size. These pipes may be repaired per Sections 12 and The holes shall be drilled radially and completely through the pipe wall, with care being taken to avoid distortion of the pipe while drilling.

Combining values from the two systems may result in nonconformance with the specification. If, by any chance however small it may bethe products fail to satisfy the customers, we act on our product replacement scheme to ensure that they receive better. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

Seamless and straight-seam welded austenitic pipe intended for high temperature and general corrosive service. Asmt corrosion cracking occurs when stainless steels are subjected to tensile stress, while in contact with solutions containing chlorides.

The pipe shall be made by the seamless or an automatic welding process, with no addition of filler metal in the welding operation. ISO Certified Co. The width of the notch shall not exceed twice the depth. Pipe having other zstm may be furnished provided such pipe complies with all other requirements of this specification.

Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

Etching tests shall be made on a cross section from one end or both ends of each pipe and shall show sound and reasonably uniform material free of injurious laminations, cracks, and similar objectionable defects.

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To be accepted, retested pipe shall meet the test requirement. The inch-pound units shall apply unless the M designation of this specification is specified in the order. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. If this supplementary requirement is specied, the number of tests per pipe required shall also be specied.

Crops ends may be used. Typically only pipe up to 8 inch is produced to this specification. Tensile and Hardness Requirements. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

Filler metal not permitted during welding. The dimensions of these standards should not be construed as the minimum size imperfection detectable by such equipment.

The values stated in each system are not atsm equivalents; therefore, each system must be used independently of the other. Subject to agreement between the purchaser and manufacturer, retest and retreatment provisions of these asttm requirements may also be modied.

ASTM A790 Standard for Duplex Stainless Steel Pipe

Tension qstm, hardening tests, flattening tests, hydrostatic tests and nondestructive electric tests shall be made to conform to the specified requirements.

Extended elevated temperature exposure can embrittle stainless.

The pipe may be accepted based on visual examination, provided the imperfection is less than 0. Notches shall be placed on both the OD and ID surfaces. Mega Mex supplies LDX,FerraliumZeron and in the form of plate, sheetstrip, bar, pipe, tubing, pipe fittings, flanges and weld wire. The primary reason for this is the priority that we give to complete satisfaction of the customer. When the M designation of this specication is the basis of purchase, the corresponding metric value s shall be agreed upon between the manufacturer and purchaser.

These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures. Pipe shall be welded in one pass by processes employing filler metal and shall be completely radiographed.

In order for you to see this page as it is meant to appear, we ask that you please re-enable your Javascript! The advantage of a duplex structure is that it combines the favorable qualities of a ferritic alloy stress corrosion cracking resistance and high strength with ast, of an austenitic alloy ease of fabrication and astmm resistance. Our products go through appropriate testing, both in Government and private laboratories.

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The methods used for cleaning and preparing the surfaces for examination shall not be detrimental to the base metal or the surface nish. Pipe having other dimensions may be furnished provided such pipe complies with all other requirements of this specication.

These steel are susceptible to embrittlement if used for prolonged periods at elevated temperatures. Within the text, the SI units are shown in brackets. Pipe having other dimensions may be furnished provided such pipe complies with all other requirements of this specification. Note 1- The dimensionless designator NPS nominal pipe size has been substituted in this standard a7900 such traditional terms as nominal diameter, size, and nominal size.

ASTM A Seamless Pipe, ASTM A Welded Pipe, ASTM AM Duplex Pipes.

These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures. Optional supplementary requirements are provided for pipe when a greater degree of testing is desired. Combining values from the two systems may result in nonconformance with the specification.

These supplementary requirements call for additional tests to be made and, when desired, one or more of these may be specified in the order. Link to Active This link will always route to the current Active version of the standard.

ASTM A790 Seamless and Welded Pipe

Tensile and Hardness Properties It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.

If this supplementary requirement is specied, the number of tests per pipe shall also be specied. The dimensionless designator NPS nominal pipe size has been substituted in this standard for such traditional terms as nominal diameter, size, and nominal size.

Addition of filler metal is permitted during welding.