ASTM A / AM – 16 Standard Specification for General Requirements for Alloy and Stainless Steel Pipe. This specification(Footnote 2). This standard is issued under the fixed designation A/AM; the number immediately specification, shall apply to the ASTM product specifications. Tolerances acc. ASTM A (welded and seamless pipes). OD mm. Tol. OD. ( mm). t/m. + > t/m. + > t/ m.

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The test pressure or stress shall be determined by the following equation: The values stated in either inch-pound units or SI units are to be regarded separately as standard. Repair by Welding These pipes may be repaired when such repair is permitted by the applicable product specication.

ASTM A999/A999M – 18

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. Combining values from the two systems may result in nonconformance with the specication. The hydrostatic test may be performed prior to cutting to nal length, or prior to upsetting, swaging, expanding, bending, or other forming operations.

Cleaning shall be performed in accordance with a written procedure that has been shown to be effective. The sensitivity of this test decreases with thickness over 0. The tolerances on outside diameter include ovality except as provided for in The width of the notch shall not exceed twice the depth.

During the second step, which is a test for soundness, the attening shall be continued until the specimen breaks or the opposite walls of the pipe meet. The inch-pound units apply unless the “M” designation SI of the product specification is specified in the order.

ASTM A for Alloy and Stainless Steel Pipe

Atm otherwise specied, pipe of NPS 4 and smaller may be weighed in convenient lots; pipe in sizes larger than NPS 4 shall be weighed separately. With the text, the SI units are shown in brackets. All required tests and inspection shall be made at the place of manufacture prior to shipment, unless otherwise specied, and shall be conducted so as not to interfere unnecessarily with operation of the works.


Surface imperfections such as handling marks, straightening marks, light mandrel and die marks, shallow pits, and scale pattern will not be considered injurious if the imperfections are ast, within the tolerances specied for wall thickness or 0. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters.

In the case of conflict between a requirement of a product specification and a requirement asgm this specification, the product specification shall prevail. The holes shall be drilled radially and completely through the pipe wall, with care being taken to avoid distortion of the pipe while drilling. A Maximum Curvature in any 3 ft, in. 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 reapproved asgm withdrawn.

Only one retest of any lot will be permitted.

A999 of rejected pipe shall be a matter of agreement between the manufacturer and the purchaser. The internal surface of hot nished ferritic steel pipe shall be pickled or blast cleaned to a free of scale condition equivalent to the CSa2 visual standard in SSPC-SP6. Packaging, Marking, and Loading The dimensions of these standards should not be construed as the minimum size imperfection detectable by such equipment.

The methods used for cleaning and preparing the surfaces for examination shall not be detrimental to the base metal or the surface nish.

Combining values from the two systems may result in non-conformance with the standard. Current edition approved March 10, The range of pipe sizes that may be examined by each method shall be subject to the limitations in the scope of the respective practices. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.


One hole shall be drilled in the weld, if visible. The outside diameter at the point of grinding may be reduced by the amount so removed.

The standard sizes do not prohibit the production and use of other sizes of pipe produced to the various product specications referenced in 1.

The bottom of imperfections shall be visible and the prole shall be rounded and faired-in. In the case of conflict between a requirement of the product specification or a requirement of this specification and a more stringent requirement of the purchase order, the purchase order shall prevail. This standard does not purport to address all of the safety concerns, if any, associated with its use.

A signature or notarization is not required on the certied test report, but the document shall be dated and shall clearly identify the organization submitting the report.

ASTM A999 for Alloy and Stainless Steel Pipe

This procedure shall be available for audit. NOTE 2—Thin-wall pipe usually develops signicant ovality out-ofroundness during nal annealing, straightening, or both. To be accepted, retested pipe shall meet the test requirement. It should be recognized that different techniques should be used to detect differently oriented imperfections. In the case of conflict between a requirement of the product specification or a requirement of this specification and a more stringent requirement of the purchase order, the purchase order shall prevail.