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 -

KARL DEUTSCH
INSTRUMENTS AND SYSTEMS FOR NON-DESTRUCTIVE TESTING OF MATERIALS.

12356 views
Technical Discussions
Shibu T James
Shibu T James
02:56 Sep-10-2008
100% RT on process piping

Can you help me? 100% RT required for process piping in lieu of hydro test, do you know any other circumstances we can request for 100% RT for butt weld joints?


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

Nigel Armstrong

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1096
05:53 Sep-10-2008
Re: 100% RT on process piping
Hi Shibu

Code B31.3. requires 100% RT under severe cyclic conditions and for Chapter IX, High Pressure Piping.

Your 2nd sentence should bear a warning as it falls short of the total requirements for closure (golden) welds, para 345.9, and also the conditions under which hydrotest may be omitted, para. 345.1(c). There is also a requirement for flexibility analysis and senstitive leak test plus any further Owner-imposed requirements such as in-process examination.

You ask when "we can request" 100% RT. Do you mean the Owner as defined by ASME? If its not a specific Code requirement as in the case of normal fluid service (5% random RT), but the Owner wants the extra confidence through 100% RT then this should be stipulated at the FEED stage so that there will be no "Its non-contractual so either we wont do it or we shall re-charge" from your inspection contractor.

Hope this helps

Nigel


----------- Start Original Message -----------
: Can you help me? 100% RT required for process piping inlieu of hydro test, do you know any other circumstances we can request for 100% RT for butt weld joints?
------------ End Original Message ------------




    
 
 
Rafal Mis
Sales, - Technical Support
Olympus Poland, Poland, Joined Sep 2008, 11

Rafal Mis

Sales, - Technical Support
Olympus Poland,
Poland,
Joined Sep 2008
11
08:25 Sep-11-2008
Re: 100% RT on process piping
----------- Start Original Message -----------
: Can you help me? 100% RT required for process piping in lieu of hydro test, do you know any other circumstances we can request for 100% RT for butt weld joints?
------------ End Original Message ------------

I'd like to put in the picture UT of pipes instead of RT. Some companies accept special IBUS-TD method for UT of thin pipe welds. This method in very sensitive, reliable and is much cheaper than RT. If this post gave you any help than please write to me for additional informations.


    
 
 
John O'Brien
Consultant, -
Chevron ETC , USA, Joined Jan 2000, 278

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
278
03:45 Sep-11-2008
Re: 100% RT on process piping
----------- Start Original Message -----------
: Can you help me? 100% RT required for process piping in lieu of hydro test, do you know any other circumstances we can request for 100% RT for butt weld joints?
------------ End Original Message ------------

The ASME Codes are a minimum set of standard requirements and should always be part of a wider engineering set of specifications developed by the owner to fully cover the intended application. The owner can always increase the required degree or type of examination above the minimum code requirements its just a question of are you willing to pay for it. Remember its often not just the cost of examination that contractors may want to recover they may want to increase their allowance for re-work especially on lump sum jobs to allow for the fact that the increased examination may find more items requiring repair.


    
 
 
Ed T.
Ed T.
03:12 Sep-12-2008
Re: 100% RT on process piping
I have been pon projects where the final welds or "Golden Welds" get 100% RT in lieu of hydrotesting. I have also seen situations where we were tying into an existing line. The owner was concerned the existing line was old and may not take the hydrotest pressure so we would perform 100% RT in lieu of hydro.
This is awlway agreed to before the work is perfomed though.

----------- Start Original Message -----------
: Can you help me? 100% RT required for process piping in lieu of hydro test, do you know any other circumstances we can request for 100% RT for butt weld joints?
------------ End Original Message ------------




    
 
 
fadhilhasb
fadhilhasb
07:33 Jul-07-2017
Re: 100% RT on process piping
In Reply to Shibu T James at 02:56 Sep-10-2008 (Opening).

In ASME B31.4 or B31.8. That have statement show when perform 100% RT for piping can waive Hydrotest requirement?

    
 
 
Steven Doc
Other, Quality Manager
Siemens Energy, Egypt, Joined Feb 2011, 187

Steven Doc

Other, Quality Manager
Siemens Energy,
Egypt,
Joined Feb 2011
187
17:49 Jul-10-2017
Re: 100% RT on process piping
In Reply to fadhilhasb at 07:33 Jul-07-2017 .

Personally I would not accept RT in lieu of Hydrotest. They are completely different examinations resulting in completely different outputs.

100% RT only tells us if the welder has performed to pre determined workmanship standards, it tells zero about the integrity of the weld.

    
 
 

Product Spotlight

NovaScope 6000

The all-digital Novascope 6000 is a portable, ultra-high precision thickness gauge for high-speed
...
thickness measurement. Novascope 6000 has unmatched capabilities and unique features including: •Superior Resolution with high contrast, high-speed color RF display •High pulser voltage •Real-time video output •Increased internal/external data storage •Programmable SetUp features •Battery & AC Powered
>

Compact NDT inspection-heads for measurements with active thermography

The compact inspection head is suitable for thermographic ndt tasks. The uncooled infrared camera
...
is specially developed for NDI-tasks and offers a thermal sensitivity until now known only from thermal imagers with cooled detector. All required components and functions are integrated into the inspection-head. You will only need an ethernet cable to connect the sensor with the evaluation system.
>

ISAFE3 Intrinsically Safe Sensor System

ISAFE3 intrinsically safe sensor system of Vallen Systeme is especially targeted at the petrochemica
...
l - as well as oil and gas transportation industry. The sensor system is designed for permanent monitoring or periodic inspection tasks. Sensors are available for different AE-frequency ranges optimized for corrosion and fatigue crack detection and other applications. The ISAFE 3 sensor system consists of an AE-sensor (model ISAS3) certified according to ATEX/IEC for installation in zone 0, gas group IIC, IP68, 20 to +60 °C, and a signal isolator (model SISO3) certified for installation in zone 2. An ISAS3 sensor can be mounted in atmosphere or submerged, e.g. in water or crude oil. It is supported by mounting tools for temporary (magnets) or permanent (welded) installation. ISAFE3 supports automatic sensor coupling test and can be used with any AE signal processor supporting 28V supply at 90 mA peak, e.g. Vallen Systeme ASIP-2/A.
>

XRHRobotStar

In high volume industries like automotive the requirement for a hundred percent X-ray inspection c
...
reates a bottleneck in the production. The XRHRobotStar is a fully Automated Defect Recognition (ADR) capable robot-system that allows an ultra-fast in-line inspection.
>

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