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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Duplex Steel Flangesand Grades. The length of the notch shall be compatible with the testing method. The dimensionless designator NPS nominal pipe size has been substituted in this standard for such traditional terms as nominal diameter, size, 7a90 nominal size. A superscript epsilon e indicates an editorial change since the last revision or reapproval.

The test system settings may be changed or the transducer scoil sor sensor s adjusted and the unit restandardized. Seamless austenitic pipe for high temperature applications.

– Buy and Sell Project Materials

Duplex Steel and Pipe. Same as Class 3 except that the astj process exposed to the inside pipe surface may be made without the addition of filler metal.

Subject to agreement between the purchaser and manufacturer, retest and retreatment provisions of these supplementary requirements may also be modied. Markings on the Pipe The full identification of the pipe should be continuously marked down its whole length, including:.

We at Ganpat Industrial Atsm ensure that all our materials go through strict quality tests before dispatching them to our clients. High corrosion and erosion resistance is a must for storage tanks, whether the designer wants to prevent leakage during desalinization, avoid contamination in pharmaceutical or food processing, or store chips as well as black and white liquor for q790 pulp and paper industry.


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. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. The hole diameter shall vary with NPS as follows: The Class Number dictates how the pipe is welded and what non-destructive tests:.

These steel are susceptible to embrittlement if used for prolonged periods at elevated temperatures. These pipes may be repaired per Sections 12 and Single-seam, single- or double- welded austenitic pipe for high temperature and general corrosive applications. Work Item s – proposed revisions of this standard. The inch-pound units shall apply unless the M designation of this specification is specified in the order.

ASTM A790 Standard for Duplex Stainless Steel Pipe

Pipe shall be double welded by processes employing filler metal in all passes. This standard is subject to revision at any time by a70 responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn.

Appendix X1 of this specification lists the dimensions of welded and stainless steel seamless pipe as shown in ANSI B If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.

Nondestructive electric tests shall be in accordance with Practice E or E Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Tension tests shall be made on specimens from 2 pipes for lots of more than pipes. Note 1- The dimensionless designator NPS nominal pipe size has been substituted in this standard for ashm traditional terms as nominal diameter, size, and nominal size.


Heat analysis shall be made to determine the percentages of the elements specified. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.

To be accepted, a repaired pipe must pass the same non-destructive test by which it was rejected, and it must meet the minimum wall thickness requirements of this specication.

The high chromium, molybdenum and nitrogen contents of provide corrosion resistance superior to common stainless steels, such as, L and L in most environments and Citizen Metals has been actively involved in ensuring the best aetm of the same to our clients.

This resistance is extremely important for services such as marine environments, brackish water, bleaching operations, closed loop water systems and some food processing applications. Workmanship, Finish, and Appearance Duplex Stainless Steels Products Manufacturers. Other 4 nondestructive tests may be applied to the end areas, subject to agreement between the purchaser and the manufacturer.