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 -

I&T Nardoni Institute
A state-of-the-art company servicing the metal, mechanical, aeronautical and railway industrial sectors

651 views
Technical Discussions
daniel iordache
daniel iordache
06:48 Apr-12-2004
schedule of NDT inspection

hello ,
i want, if anyone can help me to find out how to arrange the inspection's schedule - for gas plant and process area ??- according with....
what code ...?
section...?
my location has 30 years old.
thanks daniel


    
 
 
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
03:10 Apr-13-2004
Re: schedule of NDT inspection
Hi,

I recommend you carry out complete thickness measurement (e.g., all elbows, either side of all butt welds, every 2 meters interval, 100% normal probe scanning at randomely selected locations, etc.) to determine the internal surface condition and extensive visual inspection to evaluate the external condition of the pipeline.

Then find out the maximum external and internal wall thickness loss for each line from the inspection results. Then calculate the maximum possible loss of wall thickness:

Maximum wall thickness loss = Nominal thickness - (Internal metal loss + External metal loss)

Then determine corrosion rate per per by dividing it by the number of years in service.

i.e., Corrosion rate per year = Total wall loss/No. of Years in service.

Calculate the minimum design thickness required for that line using barlow's equation and add safety factor (if any).

i.e., minimum required thickness = design thickness+ safety factor.

If the remaining thickness is well beyond the minimum required thciness and more than yearly corrosion rate, then you can schedule periodic on-line inspection yearly. Also you can schedule bi-annually if the remaining thickness is more tha twice the corrosion rate+ design thickness. You can schedule the inspection every 6 moths if the remaining thickness is too low but still above the minimum required thickness.

Replace the line when it is equal to or less than minimum required thickness.

N.Kuppusamy


----------- Start Original Message -----------
: hello ,
: i want, if anyone can help me to find out how to arrange the inspection's schedule - for gas plant and process area ??- according with....
: what code ...?
: section...?
: my location has 30 years old.
: thanks daniel
------------ End Original Message ------------




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

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
278
01:36 Apr-13-2004
Re: schedule of NDT inspection
Complex question as there are so many variables. I suggest you consult the API Standards on in-service inspection of process plant API 510, API 570 and API 653.

These provide minimum interval guidance and an option to select Risk Based Inspection Assessent approaches to Interval Planning.

You should laso verify there are no local jurisdictional requirmeents you have to meet.




    
 
 

Product Spotlight

TVC awarded UKAS accreditation

TVC are delighted to finally announce we have been awarded UKAS accreditation for our calibration
...
laboratory. Laboratory accreditation to ISO/IEC 17025:2005 enables us to conduct the Electrical Verification of Ultrasonic Flaw Detection Equipment to BS EN 12668-1:2010. It has taken many months of hard work and we want to thank our staff for all their efforts during this massive undertaking.
>

NDTkit RT

NDTkit RT, TESTIA's Digital Radiography software The NDTkit product line software for X-ray analysi
...
s. NDTkit RT is a software benefiting from the Ultis kernel which is dedicated to radiographic image analysis. It offers a set of tools and filtering processes to assist RT operators in finding relevant flaws.
>

FlexoFORM™

The FlexoFORM™ solution integrates flexible phased array probe technology in a scanner to solv
...
e the challenges that come with inspecting pipe elbows. When combined with a water column, this solution can be used to collect easy-to-interpret data on elbows with diameters ranging from 4.5 in. OD up to flat and offers many benefits.
>

CIVA 2017 UT Module

CIVA NDE Simulation Software is the world leader of NDT Simulation. The UT simulation Module incl
...
udes: - "Beam computation": Beam propagation simulation - "Inspection Simulation": Beam interaction with flaws or specimens The user can simulate a whole inspection process (pulse echo, tandem or TOFD) with a wide range of probes (conventional, Phased- arrays or EMAT), components, and flaws.
>

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