ASME OM CODE INTERPRETATIONS-2008 pdf download

ASME OM CODE INTERPRETATIONS-2008 pdf download.
Subject: ASMUANSI OM-1 987, Part 4; ASME OM Code-1990, Subsection ISTD; ASME OM Code- 1995, Subsection ISTD With ASME OMa Code-1996 Date Issued: September 12, 1 997 File: OMl-97-09 Question: Does the OM Code, Subsection ISTD, apply to a gapped component support, exam- ined per the requirements of Section XI, Articles IWF-2000 and IWF-3000. A gapped component support, is a catalog component which incorporates an adjustable gap to accommodate thermal growth, designed such as to limit the overall piping or equipment displacement through a positive, mechanical stop. Reply: No. Interpretation: 98-5 Subject: ASMYANSI OM-1 987 With ASMYANSI OMa-1 988, Part 10, Paras. 4.2.1.2, 4.2.1.3, and 4.2.4; Power-Operated Valves, Stroke Time Measurement Date Issued: September 24, 1 997 File: OMl-97-07 Question (1): Is it a requirement of OM-1 987 with OMa-1 988, Part 10, paras. 4.2.1.2, 4.2.1.3, and 4.2.1.4, that the stroke time of a power-operated valve be measured from the initiation of the actuating signal to the indication of the end of the operating stroke? Reply (1 ): Yes. Question (2): Is it a requirement of OM-1 987 with OMa-1 988, Part 1 O, paras. 4.2.1.2, 4.2.1.3, and 4.2.1.4, that the stroke time of a power-operated valve be measured from the initiation of the actuating signal to the end of the obturator movement? Reply (2): No. Question (3): For power operated valves whose full-stroke time is measured using remote posi- tion indicating lights controlled by limit switches which are positioned at less than full valve obtu- rator travel, is it acceptable to comply with OM-1 987 with OMa-1 988, Part 1 O, para. 4.2.1.4, stroke- timing requirements by measuring the valve stroke time from initiation of the actuating signal to the indication of the end of the operating stroke in accordance with para. 4.2.1.3? Reply (3): Yes.
Interpretation: 98-6 Subject: ASMUANSI OMa-1 988, Part 6, Paras. 4.6.4(a) and 4.6.4(b), and ASME OM Code-1990, Date Issued: October 9, 1 997 File: OMI-97-02 Subsection ISTB, Paras. 4.6.4(a) and 4.6.4(b) Question (1): For a vertically oriented centrifugal pump, which the Owner has determined is not a vertical line shaft pump, do the requirements of para. 4.6.4(b) apply? Reply (1): No. Question (2): For a vertically oriented centrifugal pump, which the Owner has determined that the pump and driver do not form an integral unit, does para. 4.6.4(a) require an axial vibration mea- surement on the upper motor bearing housing? Reply (2): No. Interpretation: 98-7 Subject: ASMUANSI OM-1 987, Part 1, Para. 8.1.3.1; Test Media Date Issued: October 22, 1 997 File: OMl-96-1 4 Question (1): Is it a requirement of OM-1 987, Part 1, para. 8.1.3.1, Test Media, to require set point test of liquid service relief valves using only liquid (¡.e., compressible fluids shall not be used to test liquid service valves)? Reply (1 ): Yes. Question (2): Is it permissible under the rules of OM-1 987, Part 1, para. 8.1.3.1, Test Media, to meet the requirements of para. 8.3, Alternate Test Media, when alternate fluids, such as nitrogen, are used to perform set point test for liquid service relief valves. Reply (2): Based on the response to Question (11, the second question is improper.
Interpretation: 98-8 Subject: ASMUANSI OM-1987, Part 1, Para. 3.3.1 .l, Main Steam Pressure Relief Valves With Auxiliary Actuating Devices Date Issued: October 22, 1 997 File: OMI-97-05 Question (1 1: Is it a requirement of OM-1 987, th at a pilot operated relief valve 1 actuating device be tested as a unit in accordance with para. 3.3.1.1 (c)? with an auxiliay Reply (1): No. Question (2): Is it permissible under the rules of OM-1 987, para. 3.3.1.1, to perform the set pres- sure determination on the pilot operator after the pilot operator is removed from the valve body. Reply (2): Yes. Interpretation: 98-9 Subject: ASMUANSI OM-1 1981, Part 1 and Later Editions Through ASME/ANSI OMc-1 990 and ASME OM Code-1 990 and Later Editions and Addenda Through ASME OM Code-1 995 Date Issued: November 4, 1 997 File: OMI-94-1 O Question (1): Are the requirements of ANSVASME OM, Part 1, para. 4.3 (ASME OM Code, Appendix I, para. I 4.3), Alternate Test Media, met if the cold differential test pressure as marked on the name- plate as provided by the manufacturer is used as an alternate test pressure as permitted by paras. 4.1.2.1 and 4.1.3.1 [paras. I 4.1.2(a) and I 4.3(a)] and provided no other qualification exists? Reply (1): No. Question (2): Are the requirements of ANSVASME OM, Part 1, para. 4.3 (ASME OM Code, Appendix I, para. I 4.3), Alternate Test Media, met if the documentation required by para. 4.3.2 (para. I 4.3.2) and the written procedure required by para. 4.3.3 (para. I 4.3.3) are prepared by the valve manu- facturer and accepted/certified by the Owner