345.1 Required Leak Test
pneumatic leak testing impracticable, the alternative
specified in para. 345.9 may be used if both of the following
conditions apply:
(1) a hydrostatic test would
(a) damage linings or internal insulation
(b) contaminate a process that would be hazardous,
corrosive, or inoperative in the presence of moisture
(c) require significant support modifications for
the hydrostatic test load or
(d) present the danger of brittle fracture due to
low metal temperature during the test
(2) a pneumatic test would
(a) present an undue hazard of possible release
of energy stored in the system or
(b) present the danger of brittle fracture due to
low metal temperature during the test
(d) Unless specified in the engineering design, lines
open to the atmosphere, such as vents or drains downstream
of the last shutoff valve, need not be leak tested.
The following procedures and leak test method may be
used only under the conditions stated in para. 345.1(c).
345.9.1 Examination of Welds. Welds, including
those used in the manufacture of welded pipe and fittings,
that have not been subjected to hydrostatic or
pneumatic leak tests in accordance with this Code, shall
be examined as follows:
(a) Circumferential, longitudinal, and spiral (helical
seam) groove welds shall be 100% radiographed in
accordance with para. 344.5 or 100% ultrasonically
examined in accordance with para. 344.6.
(b) All welds, including structural attachment welds,
not covered in (a) above, shall be examined using the
liquid penetrant method (para. 344.4) or, for magnetic
materials, the magnetic particle method (para. 344.3).
Dear Gulam,There is No specific standard says that 100% DPT requirement for golden welds, Its a general Practice and also you may refer Project specification as Client Issued ..You have have found some criteriaSureshOn Tue, Nov 6, 2018 at 11:53 AM abdou <bouguera.abdelaziz35@gmail.com> wrote:Hi dear Lakshman Kumar--I want to ask about any standard that require Every layer of weld with 100%DPT for a golden joint at an weldoletand ..sorry for my english
Le samedi 30 octobre 2010 10:48:07 UTC+2, Lakshman Kumar a écrit :Dear All,
In pipe line activities the joints which are not hydro tested are generally referred as golden joints.
These joints will come especially making tie-in's of for 2 hydro test of sections.
I was experienced with the section as follows….
100 % NDT Is must in this case.
Option 1
1. Root 100% DPT
2. Every layer of weld with 100%DPT.
3. Final run 100% DPT.
4. 100 % UT.
Option 2
1. Root 100% DPT
2. 100 % RT
This is my personal experience
Thanks & Regards
Lakshman kumar.B | Manager - QA/QC | LANCO INFRATECH LIMITED
Plot# 1255 | Sanjeevani Chowk | Mahanadi Vihar | Cuttack 753004Phone : + 91-671-2445033| Mobile: +91 9937286851 | www.lancogroup.com
Go Green |The future will thank you
From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of T. Mahendran
Sent: Saturday, October 30, 2010 1:42 PM
To: material...@googlegroups.com
Subject: Re: [MW:7936] golden weld joint require ments
Mr Gulam
I could remember the following things for Golden weld.
a) It means , other than of fabrication shop welding, the balance welding which will be done with only one joint at site welding( or) in a tie -in work process. This type of joints are confirmed by 100% RT or UT (NDT), since there may be a practice problem in the hydro test depends with the pipe length.
b)There is no specific code for Golden joint but most of the companies are follow to perform a "golden weld", with 100% NDT by eliminating hydro test.
c) We can refer ASME 31.4, and it permits a "waiver" of a hydro test on "tie-in" welds between two sections of piping , that the weld has already undergone 100% NDT (see Section 437.1.4 (b) Testing Tie ins, ASME B31.4 2002 Edition).
T.Mahendran
KSA
From: Gulam kader <arm...@gmail.com>
To: material...@googlegroups.com
Sent: Sat, October 30, 2010 9:42:49 AM
Subject: [MW:7933] golden weld joint require ments
Dear all,
can any one explain the golden joint welding , NDT and inspection requirement with Code references.
Regards,
Gulam Kader--
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