RE: [MW:3776] painting before hydrotest for B31 piping

345.8 Sensitive Leak Test The test shall be in accordance with the Gas and Bubble Test method specified in the BPV Code, Section V, Article 10,   (a)The test pressure shall be at least the lesser of 105 kPa (15 psi) gage, or 25% or the design pressure. (b) The pressure shall be gradually increased until a gage pressure the lesser of one-half the test pressure or 170 kPa (25 psi) is attained,   The minimum test pressure mandated by B31.3 is the lesser of 15 psi or 25% of the design pressure (when design pressure is less than 60 psi). ohm guru namasivaya --- On Tue, 12/1/09, Singh Rishi (TIPO - QA/QC) <R.Singh@Panipat.ticb.com> wrote: From: Singh Rishi (TIPO - QA/QC) <R.Singh@Panipat.ticb.com> Subject: RE: [MW:3775] painting before hydrotest for B31 piping To: materials-welding@googlegroups.com Date: Tuesday, December 1, 2009, 9:13 AM What exactly a "sensitive leak test" means ?  Does it means pneumatic test ?   Best Regards,                                                                    Rishi Raj Singh From: Bathula Raghuram (Mumbai - PIPING) [mailto:R.Bathula@ticb.com] Sent: Tuesday, December 01, 2009 9:10 AM To: materials-welding@googlegroups.com Subject: RE: [MW:3774] painting before hydrotest for B31 piping   do you need it for B31.1 or B31.3? pl. refer above interpretation # 5-23, may also find similar interpretations in #2-6, and 3-10 Interpretation: 5-23 Subject: ANSI/ASME 831, Hydrotest Preparation Date issued: June 11, 1987 File: B3 1-86-033 Question: May all joints, including welds, used in piping systems covered by ANSI/ASME B31.1, ANSI/ASME 831.3, ASME/ANSI 831.4, ANSI/ASME 831.8, ANSi/ASME B31.9, and ANSI/ASME 831.1 1 be primed and painted prior to hydrotest? Reply: Yes.     From: pgoswami@sympatico.ca [mailto:pgoswami@sympatico.ca] Sent: Tuesday, December 01, 2009 12:53 AM To: materials-welding@googlegroups.com ; daniel.iordache@gmail.com Subject: FW: [MW:3773] hydrotest b31.1 Daniel,   I attached the interpretation of B-31.3 code on the issue of painting before hydrotest:-   In ASME, B-31.3-2006 Clause 345.3.1  specifies, All joints, welds (including structural attachment welds to pressure-containing components),and bonds shall be left uninsulated and exposed for examination during leak testing, except that joints previously tested in accordance with this Code may be insulated or covered.   All joints may be primed and painted prior to leak testing unless a sensitive leak test is required. The word may is suggestive not mandatory.   However  the best practice for  painting ,before or after hydrotest may be mutually resolved with client, depending on the interest of the project.   Painting before hydro test may involve double and redundtant work.Especially if the defect is detected on a painted surface during hydro test.area to be repaired would require the paint to be stripped and repainted after successful repair.    I hope this would  clarify the issue. Appreciate inputs from the others.   Thanks.   Pradip Goswami,P.Eng Senior Engineer/Specialist(Welding-Metallurgy) Component Integrity Dept. Engineering & Training Services Division ONTARIO POWER GENERATION Inc. PO Box-2000, RR-55(South) Nanticoke, Ontario,N0A1L0 Tel:-(519) 587-2201, Ext 3107--in Nanticoke          (416) 231-4111, Ext 5925--in Kipling, Toronto Fax: (519) 587-6814 Email-pradip.goswami@opg.com.   Date: Mon, 30 Nov 2009 15:39:12 +0100 Subject: [MW:3771] hydrotest b31.1 From: daniel.iordache@gmail.com To: materials-welding@googlegroups.com Hi,    I have a strange situation about Hydrostatic Test ......   Until now we used to let all welds of piping system no painted........   now our client read in B31.3 and open the discussion that in code is wrote that is allowed to paint the welds before hydrostatic test......   What do you think about that?????   regards -- Daniel Iordache Bureau Veritas - Angola Mechanical& Welding Surveyor Mobile Ao: +244921544583 Mobile Ro:   +40721731728 E-Mail: daniel.iordache@gmail.com           daniel_iordache@yahoo.com -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents. -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.