where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

ULTRASOUND INSTITUTE
The Ultrasound Institute can develop new advanced ultrasonic measurement, imaging and NDT techniques for non-conventional applications.
2237 views
Technical Discussions
Binh, Du Xuan
Binh, Du Xuan
02:24 Aug-24-2007
NDT after PWHT

Dear All,

Pipe spool fabrication base on Code and standards B31.3.

Everyone can give to me advice ?

MT after PWHT shall be done or not necessary ?

Thanks and Best Regards,


 
 Reply 
 
Nigel Armstrong
Engineering, - Specialist services
United Kingdom, Joined Oct 2000, 1096

Nigel Armstrong

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1096
08:38 Aug-24-2007
Re: NDT after PWHT

See B31.3 Para. 341.3.1.(a) "For P-Nos. 3, 4, and 5 materials, examination shall be performed after completion of any heat treatment."

This implies that P1 and P2 materials do not require examination after heat treatment UNLESS otherwise specified by the contract or relevant procedures.


 
 Reply 
 
G.Madhesan
G.Madhesan
08:29 Aug-24-2007
Re: NDT after PWHT
MT must be carriedout after any PWHT for detectingany stress cracks.
Regards,
Madhesan





 
 Reply 
 
Nigel Armstrong
Engineering, - Specialist services
United Kingdom, Joined Oct 2000, 1096

Nigel Armstrong

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1096
04:53 Aug-25-2007
Re: NDT after PWHT
Madhesan

Yes you are right MT, is for detecting cracks (amongst other defects), however the Code writers are very experienced in the welding and heat-treating of standard materials (i.e. Group P1) and are sufficiently confident that proper PWHT of such materials will not cause cracking to be able to codify this with no requirement for PWHT MT. So in the case of welding plain carbon (P1)steels, "must" does not apply.


----------- Start Original Message -----------
: MT must be carriedout after any PWHT for detectingany stress cracks.
: Regards,
: Madhesan
------------ End Original Message ------------




 
 Reply 
 

Product Spotlight

Wireless TOFD scanner

Quick, accurate and highly reproducible welds testing. The System operates wirelessly and is compat
...
ible with any type of Windows based Laptop, Desktop or Tablet.
>

MUSE Mobile Ultrasonic Equipment

The MUSE, a portable ultrasonic imaging system, was developed for in-field inspections of light-weig
...
ht structures. The MUSE consists of a motor-driven manipulator, a water circulation system for the acoustic coupling and a portable ultrasonic flaw detector (USPC 3010). The MUSE provides images of internal defects (A-, B-,C- and D-scan).
>

TESTD-PT SYSTEM

Pulse thermography is a non-contact test method that is ideal for the characterization of thin fil
...
ms and coatings or the detection of defects. With a remarquable short test time and a high detection sensitivity, the Telops TESTD-PT is the perfect tool for non- destructive testing. With such high frame rates, it is even possible to investigate highly conductive or diffusive materials.
>

UCI Hardness Tester NOVOTEST T-U2

UCI hardness tester NOVOTEST T-U2 is is used for non-destructive hardness testing of: metals and
...
alloys by scales of hardness: Rockwell (HRC), Brinell (HB), Vickers (HV); non-ferrous metals, alloys of iron etc., and using five additional scales for calibration; with tensile strength (Rm) scale determines the tensile strength of carbon steel pearlitic products by automatic recalculation from Brinell (HB) hardness scale.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window