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 -

Controle Mesure Systemes
Contrôle Mesure Systèmes designs, develops and manufactures nearly 30 years a complete NDT range of products in eddy current and ultrasonic testing methods.

1096 views
Technical Discussions
daniel
daniel
00:16 May-21-2006
inspection methodes for pipe line has been working over pressure

hello
i need information how to inspect a line that was subject for short period by over pressure around 3500 psi - 6" schedule 80 -flange rate 600
thanks


    
 
 
Rich Roberts (Quest TruTec)
Engineering, Executive Managment
Quest Integrity Group, USA, Joined Nov 1998, 78

Rich Roberts (Quest TruTec)

Engineering, Executive Managment
Quest Integrity Group,
USA,
Joined Nov 1998
78
08:10 May-22-2006
Re: inspection methodes for pipe line has been working over pressure
Good Day,

You may want to consider applying the "ultrasonic" based FTIS Intelligent Pigging technology. The FTIS system can clearly detect and quantify damages such as: Bulging, Swelling, Ovality in addition to Corrosion, Erosion & Pitting.

Regards, Rich Roberts
Quest TruTec




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

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
278
01:14 May-23-2006
Re: inspection methodes for pipe line has been working over pressure
On a rough calculation you have exceeded maximum allowable pressures on both pipe and flanges by a factor of 2.

You do not indicate how long the over pressurisation was for or what the current working pressure is. You also do not indicate temperature and fluid service and whether the pipe is aboveground or buried.

You need to consider a risk assessment looking at all these factors plus was this a one time deal or have you been cycling the piping system.

Consider likelihood and consequences of failure, impact on operations, environment etc.

First is a visual to look for visible signs of damage, leaking flanges, loose bolts, deformation, misalignment, stressed pipe supports etc. API RP 574 can be used for guidance.

If this first go around looks good then you may have mitigated your risk of an immediate release.

Then consider long term operation, how long, what pressure, fluid service, future pressure excursions.

If there remains a high concern then you may need to proceed to the approach suggested by Rich Roberts or it may be more cost eefective to schedule a replacement.




    
 
 
Robert Davis
Robert Davis
08:46 May-29-2006
Re: inspection methodes for pipe line has been working over pressure
Please be clear, is this a design pressure or operating pressure. Even if design let's back out of the analysis and look at the uncertianty with the stress. Then look at the actual design numbers, generally you will find that you never went above yeild. OK once this has been looked at, now find a reference for the creep properties. Using the NDE results for maximum flaw size apply the flaw diameter and determine the Kic.

RBD


    
 
 

Product Spotlight

EKOSCAN Phased Array

In order to always fit your needs, EKOSCAN can manufacture any type of UT transducer, either convent
...
ional or Phased Array. As an ISO 9001: 2015 certified company, EKOSCAN is extremely careful as far a material selection and manufacturing processes are concerned. Our probes guarantee our customers the benefits of latest innovations regarding piezo-composite, backing, impedance adaptation layer, etc. Specific probes for hostile environment: high temperature, high pressure, corrosive environment,etc. Specific probes designed to fit your specific application: optimization of every parameter to guarantee you the best detection.
>

Ultrasonic tomograph for imaging of concrete structures А1040 MIRA

Applicable for concrete inspection allowing imaging of the internal structure of objects from conc
...
rete, reinforced concrete, different stones. The operation applies pulse-echo technique at one-side access to the object. The instrument is feasible for concrete inspection for searching conduct ducts, conduits, detection of foreign inclusions, holes, honeycombing, cracks and other concrete defects.
>

Lyft™: Pulsed Eddy Current Reinvented

PEC Reinvented—CUI Programs Redefined Corrosion under insulation (CUI) is possibly the greatest u
...
nresolved asset integrity problem in the industry. Current methods for measuring wall thickness with liftoff, without removing insulation, all have severe limitations. Eddyfi introduces Lyft — a reinvented, high-performance pulsed eddy current (PEC) solution. The patent- pending system features a state-of-the-art portable instrument, real- time C-scan imaging, fast data acquisition with grid-mapping and dynamic scanning modes, and flexibility with long cables. It can also scan through thick metal and insulation, as well as aluminum, stainless steel, and galvanized steel weather jackets. Who else but Eddyfi to reinvent an eddy current technique and redefine CUI programs. Got Lyft?
>

Exertus Dual 120

The Exertus Dual 120 Projector has the ability to accept Iridium 192 sources or Selenium 75 source
...
s. This projector incorporates design and safety features that make it flexible, compact and lightweight. The Projector is lighter than most of its competitors. It incorporates an improved source channel, based on a new helicoidal design, which makes maintenance easier. The helicoidal design also allows smoother movement of the source assembly inside the device, making it easier for the operator and improving safety. The Projector also has a unique safety feature not found in competitive products. The source assembly locking mechanism is triggered by the source holder capsule at the front of the source assembly, thereby always assuring the operator that the source has returned to the safe position. The Exertus Dual 120 is ISO3999:2004 compliant.
>

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