ASME SA335:2013 pdf free download – SPECIFICATION FOR SEAMLESS FERRITIC ALLOY- STEEL PIPE FOR HIGH-TEMPERATURE SERVICE
1.1 This specification covers nominal wall and mini- mum wall seamless ferritic alloy-steel pipe intended for high-temperature service. Pipe ordered to this specification shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Selec- tion will depend upon design, service conditions, mechani- cal properties, and high-temperature characteristics.
1.2 Several grades of ferritic steels (see Note 1) are covered. Their compositions are given in Table 1. NOTE 1 — Ferritic steels in this specification are defined as low- and intermediate-alloy steels containing up to and including 10% chromium.
1.3 Supplementary requirements (S1 to S7) of an optional nature are provided. These supplementary require- ments callforadditionaltests to be made, andwhendesired, shall be so stated in the order together with the number of such tests required.
1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each systemmustbe usedindependentlyofthe other. Combining values fromthe two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the “M” designation ofthis specification is specified in the order. NOTE 2 — The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as “nominal diameter,” “size,” and “nominal size.”
7.1 The pipe manufacturer shall explore a sufficient number of visual surface imperfections to provide reason- able assurance that they have been properly evaluated with respect to depth. Exploration of all surface imperfections is not required but may be necessary to ensure compliance with 7.2.
7.2 Surface imperfections that penetrate more than 12 1 ⁄ 2 % of the nominal wall thickness or encroach on the minimum wall thickness shall be considered defects. Pipe with such defects shall be given one ofthe following dispo- sitions:
7.2.1 The defect may be removed by grinding pro- vided that the remaining wall thickness is within specified limits.
7.2.2 Repaired in accordance with the repair welding provisions of 7.6.
7.2.3 The section of pipe containing the defect may be cut off within the limits of requirements on length.
7.2.4 Rejected.
7.3 To provide a workmanlike finish and basis for evaluating conformance with 7.2, the pipe manufacturer shall remove by grinding the following:
7.3.1 Mechanical marks, abrasions (see Note 5) and pits, any of which imperfections are deeper than 1 ⁄ 16 in. [1.6 mm]. NOTE 5 — Marks and abrasions are defined as cable marks, dinges, guide marks, roll marks, ball scratches, scores, die marks, and the like.
13.8.3.2 Transverse Tangential Notch — Using a round tool or file with a 1 ⁄ 4 in. (6.4 mm) diameter, a notch shall be filed or milled tangential to the surface and trans- verse to the longitudinal axis of the pipe. Said notch shall have a depth not exceeding 12 1 ⁄ 2 % ofthe specified nominal wall thickness ofthe pipe or 0.004 in. (0.1 mm), whichever is greater.
13.8.3.3 Longitudinal Notch — A notch 0.031 in. or less in width shall be machined in a radial plane parallel to the tube axis on the outside surface of the pipe, to have a depth not exceeding 12 1 ⁄ 2 % of the specified nominal wall thickness of the pipe or 0.004 in. (0.1 mm), whichever is greater. The length of the notch shall be compatible with the testing method.
13.8.4 Forflux leakage testing, the longitudinal refer- ence notches shall be straight-sided notches machined in a radial plane parallel to the pipe axis. For wall thickness less than 1 ⁄ 2 in. (12.7 mm), outside and inside notches shall be used; for wall thicknesses equal to or greater than 1 ⁄ 2 in., only an outside notch shall be used. Notch depth shall not exceed 12 1 ⁄ 2 % of the specified nominal wall thickness or 0.004 in. (0.1 mm), whichever is greater. Notch length shall not exceed 1 in. (25.4 mm), and the width shall not exceed the depth. Outside and inside notches shall have sufficient separation to allow distinct identification of the signal from each notch.