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Technical Discussions
behary
behary
15:20 Apr-11-2010
time between welding and inspection

i need any standard say what time delay
between welding and inspection
i think 24 hr or if critical welding 48 hr
but i need name of standard to say that

 
 Reply 
 
Juan Amado
Engineering, Inspection
Arco Industrial, S.A., Panama, Joined Nov 2001, 44

Juan Amado

Engineering, Inspection
Arco Industrial, S.A.,
Panama,
Joined Nov 2001
44
17:01 Apr-11-2010
Re: time between welding and inspection
In Reply to behary at 15:20 Apr-11-2010 (Opening).

Behary:

You can find such instruction in AWS D1.1 Table 6.1, Visual Inspection Criteria. Part(5) - Time of Inspection.

Best regards,
Juan Amado

 
 Reply 
 
kevin
kevin
12:47 Apr-12-2010
Re: time between welding and inspection
In Reply to behary at 15:20 Apr-11-2010 (Opening).

the time delay before inspection is material and welding process specific so client specs will define the time or some specs specific to the material.

 
 Reply 
 
behary
behary
18:28 Apr-12-2010
Re: time between welding and inspection
In Reply to kevin at 12:47 Apr-12-2010 .

if material plain carbon steel what the time between welding and inspection
please clarity specific standard

 
 Reply 
 
behary
behary
19:17 Apr-12-2010
Re: time between welding and inspection
In Reply to Juan Amado at 17:01 Apr-11-2010 .

thank you very much
i need know 100W Steel
carbon percentage%

 
 Reply 
 
Ken
Senior Level III
USA, Joined Jan 2000, 14

Ken

Senior Level III
USA,
Joined Jan 2000
14
20:24 Apr-12-2010
Re: time between welding and inspection
In Reply to behary at 19:17 Apr-12-2010 .

D1.1 will give you a good reference and should be applicable if you are working on a structural project.. There are several factors to consider though, (which should be addressed in the welding procedure as well as NDT specs) if you are welding something other, or if your material or process is susceptable to hydrogen induced cracking such as live line applications. I am not familar with "100W Steel" although the formula to calculate CE can be found in the appendix relating to live line welding in the back of API 1104 or almost anywhere on the web. Good luck.

 
 Reply 
 
N.Kuppusamy
Consultant, NDT Level-III Engineer
Advanced Inspection & Testing (S) Pte Ltd, Singapore, Joined Dec 2003, 34

N.Kuppusamy

Consultant, NDT Level-III Engineer
Advanced Inspection & Testing (S) Pte Ltd,
Singapore,
Joined Dec 2003
34
15:05 Apr-13-2010
Re: time between welding and inspection
In Reply to Ken at 20:24 Apr-12-2010 .

Time of inspection depends on material and it is required if there is a possibility of delayed crack. Refer the following standards regarding time of NDE.

Offshore Standard DNV-OS-C401, October 2009 Section5 Para B105: 105 Final inspection and NDT of structural steel welds shall not be carried out before 48 hours after completion, except where PWHT is required.

API RECOMMENDED PRACTICE 2X (section 6)-2004: All NDE should be performed at a suitable interval after welds have been completed and cooled to ambient temperature. The interval can range from immediately upon cooling up to 72 hours depending on the grade of steel.

ABS GUIDE FOR NONDESTRUCTIVE INSPECTION OF HULL WELDS 2002 (Section1 Paragraph 9): The interval is to be a minimum of 24 hours for steels 400 N/mm2 (41 kgf/mm2, 58,000 psi) yield strength and a minimum of 72 hours for steels greater than 400 N/mm2 (41 kgf/mm2,

 
 Reply 
 
Daniel Gomez
Daniel Gomez
18:42 Nov-28-2016
Re: time between welding and inspection
In Reply to behary at 15:20 Apr-11-2010 (Opening).

ASME PCC-2 (2015)

Article 2.6 Full Encirclement Steel Reinforcing Sleeves for Piping
5.3 Type B Sleeves
Where delayed weld cracking is a concern, nondestructive examination of the circumferential fillet weld should be performed not less than 24 hr after welding has been completed. Alternatively, a welding procedure qualified under high cooling rate, higher carbon equivalent (CE), and testing completed after 48 hr of welding per API 1104, Appendix B, 20th Edition, should be considered.
__________________

Article 2.8 Alternatives to Traditional Welding Preheat

Carbon equivalent (CE) may be used as a means for determining the actual necessity for preheat and the level required.
Where (Wt. %):
CE = C + (Mn + Si)/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15
CE ≤ 0.45%; preheat is normally optional 0.45% ≤ CE ≤ 0.60%; preheat 200°F to 400°F
CE > 0.60%; preheat 400°F to 700°F

where CE > 0.5, delaying final NDE for at least 24 hr should be considered to identify any delayed cracking.

5 EXAMINATION
(c) Welds in high strength low alloy (HSLA) steels or steels having a CE above 0.5% are prone to delayed cracking. A waiting period of 24 hr to 48 hr to detect delayed cracking before final examination should be required.
____________________________________________

Article 2.10 In-Service Welding Onto Carbon Steel Pressure Components or Pipelines
5.2 Examination Time
When hydrogen cracking is a concern, in-service welds should be examined 24 hr to 72 hr after welding has been completed

 
 Reply 
 

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