ASME SA-31 pdf download SPECIFICATION FOR STEEL RIVETS AND BARS FOR RIVETS, PRESSURE VESSELS
7.1.2 Snap gage measurement shall be made at the point of minimum diameter, but it is not required that the rivet shall turn completely in the gage. Measurements of the maximum tolerance shall be made with a ring gage, all rivets to slip full to the head in the gage of the required size for the various diameters.
7.2 Bars — The diameter ofhot-finished rivet bars shall not vary from the size specified by more than the amounts in accordance with Table 5.
8. Workmanship, Finish, and Appearance 8.1 Rivets — The finished rivets shall be true to form, concentric, and free of injurious defects.
8.2.1 Bars shall be free of visible pipe, undue segre- gation, and injurious surface imperfections.
8.2.2 Surface Finish—Thebars shallhaveacommer- cial hot-wrought finish obtained by conventional hot roll- ing. See 4.4 for producer’s descaling option.
9. Number of Tests and Retests 9.1 Rivets —Sampling forrivetbendandrivetflattening tests shall be in accordance with Guide F 1470, detection process.
9.2.1 Two tension tests shall be made from each heat, unless the finished material from a heat is less than 50 tons (45 Mg), when one tension test will be sufficient. However, formaterial 2 in. (51 mm) andunderinthickness, when the material from one heat differs 3 ⁄ 8 in. (9.5 mm) or more in thickness, one tension test shall be made from both the thickest and the thinnest material rolled regardless of the weight represented. Each test shall conform to the specified requirements.
9.2.2 Retests on bars may be made in accordance with Specification A 29/A 29M. 10. Specimen Preparation 10.1 Rivets — Rivets shall be tested in their full-size finished condition.
10.2.1 Test specimen selection and preparation shall be in accordance with Specification A 29/A 29M and Test Methods and Definitions A 370.
10.2.2 Tension and bend test specimens for rivet bars which have been cold drawn shall be normalized before testing.
11. Test Methods
11.1 Rivets — Rivet bend and flattening tests shall be in accordance with the manufacturers standard test proce- dures.
11.2 Bars — Tension and bend tests shall be conducted in accordance with Test Methods and Definitions A 370, and especially Supplement I thereof, on steel bar products.
12.1 If the testing described in Section 9 is required by the purchaser, it shall be specified in the inquiry and contract or order.
12.2 The inspector representing the purchaser shall have free entry at all times, while work on the contract of the purchaser is being performed, to all parts of the manufacturer’s works that concern the manufacture of the material ordered. The manufacturer shall afford the inspec- tor all reasonable facilities, without charge, to satisfy him that the material is being furnished in accordance with this specification. All tests (except product analysis) and inspection shall be made at the place of manufacture prior to shipment, unless otherwise specified, and shall be so conducted as not to interfere unnecessarily with the opera- tion of the works.
13. Rejection and Rehearing
13.1 Rivets — Rivets that fail to conform to the require- ments of this specification may be rejected. Rejection should be reported to the producer or supplier promptly and in writing. In case of dissatisfaction with the results of the test, the producer or supplier may make claim for a rehearing.
13.2 Bars — Rejection and rehearing shall be in accor- dance with Specification A 29/A 29M.
14.1 The manufacturer shall furnish certification that the material was manufactured and tested in accordance with this specification together with a report of the heat analysis (5.2) and mechanical property test results (Section 6) as applicable to the product ordered. The report shall include the manufacturer’s name, ASTM designation, grade, heat number (bars only), and authorized signature.
15.1 The party responsible for the fastener shall be the organization that supplies the fastener to the purchaser.