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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Appendix X1 of this specification lists the dimensions of welded and stainless steel seamless pipe as shown in ANSI B The width of the notch shall not exceed twice the depth. The ductility of the weld shall be ast acceptable when there is no evidence of cracks in the weld or between the weld and the base metal after bending.
Tension tests, hardening tests, flattening tests, hydrostatic tests and nondestructive electric tests shall be made to conform to the specified requirements.
The values stated in either inch-pound units or SI units are to be regarded separately as standard. The methods used for cleaning and preparing the surfaces for examination shall not be detrimental to the base metal or the surface nish.
Heat analysis shall be made to determine the percentages of the elements specified.
These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures. Notches shall be placed on both the OD and ID surfaces. But all pipe tested since the last acceptable standardization must be retested for acceptance.
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Referenced Documents purchase a90 The documents listed below are referenced within the subject standard but are not provided as part of the standard. Home Contact Us Back to Top.
These supplementary requirements call for additional tests to be made and, when desired, one or more of these may be specified in the order. Combining values from the two systems may result in non-conformance with the standard. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either wstm or withdrawn. Lean Duplex Steel – e.
Duplex Steel Products: Hydrostatic or Nondestructive Electric Test Mechanical Tests Required Subject to agreement between the purchaser and manufacturer, retest and retreatment provisions of these supplementary requirements may also be modied. The inch-pound units shall apply unless the M designation of this specification is specified in axtm order. Work Item s – proposed revisions of this standard. 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: Tensile and Hardness Properties Originally approved in 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 asmt develop specific properties.
The hole diameter asm vary with NPS as follows: Crops ends may be used. Heat analysis shall be made to determine the percentages of the elements specified. Up to 6 meters, custom cut lengths Type: The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Pipe having other dimensions may be furnished provided asrm pipe complies with all other requirements of this specification.
Optional supplementary requirements are provided for pipe when a greater degree of testing is desired. The primary reason for this is the priority that we give to complete satisfaction of asstm customer.
ASTM A790 Seamless and Welded Pipe
UNS s Pipes Tubes. Markings on the Pipe The full identification of the pipe should be continuously marked down its whole length, including:. A superscript epsilon e indicates an editorial change since the last revision or reapproval. This exotic alloy is used in oil and gas exploration, chemical processing industries also make use of this alloy. These supplementary requirements call for additional tests to be made and, when desired, one or more of these may be specified in the order.
Thus, even third party inspection consolidates our claims about superior quality. Tension test s, hardening tests, flattening tests, hydrostatic test and nondestructive electric tests aetm be made to conform to the specified requirements.
If the equipment contains a reject notice lter aa790, this shall remain off during calibration and testing unless linearity can be demonstrated at that setting. If this supplementary requirement is specied, the number of tests per pipe required 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. Duplex is a nitrogen enhanced duplex stainless steel that was developed to combat common q790 problems encountered with the series stainless steels.
Mega Mex supplies LDX,FerraliumZeron and in the form of plate, sheetstrip, bar, pipe, tubing, pipe fittings, flanges and weld wire.
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. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. 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.
The inch-pound units shall apply unless the M designation of this specification is specified in the order. No radiography is required.