ASME SB338:2017 pdf free download – Standard Specification for Seamless and Welded Titanium and Titanium Alloy Tubes for Condensers and Heat Exchangers
11.3.2 The maximum hydrostatic test pressure shall not exceed 2500 psi (17.2 MPa) for sizes 3 in. (76 mm) and under, or 2800 psi (19.3 MPa) for sizes over 3 in. Hydrostatic pressure shall be maintained for not less than 5 s. When requested by the purchaser and so stated in the order, tube in sizes 14 in. (356 mm) in diameter and smaller shall be tested to one and one half times the specified working pressure, provided the fiber stress corresponding to those test pressures does not exceed one half the minimum specified yield strength of the material as determined by the equation given in 11.3. When one and one half times the working pressure exceeds 2800 psi (19.3 MPa), the hydrostatic test pressure shall be a matter of agreement between the manufacturer and purchaser.
11.4 Pneumatic Test- – Each tube so tested shall withstand an internal air pressure of 100 psi (0.69 MPa), minimum, for 5 s, minimum, without showing evidence of leakage. The test method used shall permit easy detection of any leakage by using the pressure differential method or by placing the tube under water. Any evidence of leakage shall be cause for rejection of that tube.
17.1 All tests and inspection required by this specification shall be made at the place of manufacture prior to shipment and at the manufacturer’ s expense unless otherwise specified, and shall be so conducted as not to interfere unnecessarily with the operation of the works. When specified in the order, the manufacturer shall notify the purchaser in time so that the purchaser may have his inspector present to witness any part of the tests that may be desired.
17.2 When agreed upon in writing between the manufac- turer and the purchaser, a certification that the material con- forms to the requirements of this specification shall be the basis for acceptance of the material. Otherwise, the manufacturer shall report to the purchaser or his representative the results of the chemical analyses and mechanical tests made in accordance with this specification.
18. Rounding-Of Procedure
18.1 For purposes of determining conformance with the specifications contained herein, an observed or calculated value shall be rounded off to the nearest “unit” in the last right-hand significant digit used in expressing the limiting value. This is in accordance with the round-off method of Practice E29.
19. Referee Test and Analysis
19.1 In the event of disagreement between the manufacturer and the purchaser on the conformance of the material to the requirements of this specifcation, a mutually acceptable ref- eree shall perform the tests in question using the ASTM standard methods in 2.1. The referee’s testing shall be used in determining conformance of the material to this specification.
20. Rejection
20.1 Material not conforming to this specification or to authorized modifcations shall be subject to rejection. Unless otherwise specified, rejected material may be returned to the manufacturer at the manufacturer’ s expense, unless the pur- chaser receives within 3 weeks of notice of rejection other instructions for disposition.
21. Certification
21.1 The manufacturer shall supply at least one copy of the report certifying that the material supplied has been manufactured, inspected, sampled, and tested in accordance with the requirements of this specification and that the results of chemical analysis, tensile, and other tests meet the require- ments of this specification for the grade specified. The report shall include results of all chemical analysis, tensile tests, and all other tests required by the specification.