ASME SA 335:2013 pdf free download

ASME SA 335:2013 pdf free download

7.Worknianship. Finish, and Appearance
7.1 The pipe manufacturer shall explore a sutticient number of visual surface imperfections to provide reasonable 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 l2% of the nominal wall thickness or encroach on the minimum wall thickness shall be considered defects. Pipe with such defects shall be given one of the following dispositions:
7.2.1 The defect may be removed by grinding provided 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 in. 11.6 mml.
NOTl 5 Marks and abrasions irt tkhnetl as cable Inar$.,.. dinges, guide marks. roll marks. hail scnilchcs. cwes. die marks, and the like.
7.3.2 Visual imperfections. commonly referred to as scabs, seams, laps, tears, or slivers. tiund by exploration in accordance with 7. I to he deeper than 5% of the nominal wall thickness.
7.4 At the purchaser’s discretion, pipe shall he subject to rejection if surface imperfections acceptable under 7.2 are not scattered, but appear over a large area in excess of what is considered a workmanlike finish. Disposition of such pipe shall be a matter of agreement between the manufacturer and the purchaser.
7.5 When aniperfections or defcct ure removed by grinding, a smooth curved surface shall he maintained, and the wall thickness shall not he decreased below that permitted by this specification. The outside diameter at the point of grinding may be reduced by the amount so rernos ed,
7.5.1 Wall thickness measurements shall he made with a mechanical caliper or with a properly calibrated nondestructive testing device of appropriate accuracy. In case of dispute, the measurement determined by use o the mechanical caliper shall govern.
8.2The results of these analyses shall be reported tothe purchaser or the purchaser’s representative,and shallconform to the requirements specified in Table 1.
8.3For grade P 91 the carbon content may vary for theproduct analysis by -0.01 % and +0.02% from the specifiedrange as per Table 1.
8.4If the analysis of one of the tests specified in 8.1does not conform to the requirements specified in 6.1,ananalysis of each billet or pipe from the same heat or lotmay be made,and all billets or pipe conforming to therequirements shall be accepted.
9.Tensile and Hardness Requirements
9.1 The tensile properties of the material shall conformto the requirements prescribed in Table 3.