Scope of wps and pqr, Mechanical Engineering

Assignment Help:

Scope of WPS and PQR

A Welding Procedure Specification (WPS) is written qualified welding procedure prepared to provide direction for making production welds to code requirements.

A Procedure Qualification Record (PQR) is essentially a record of welding data used to weld a test coupon. It contains the test results of tested specimens. Recorded variables normally fall within a small range of the actual variables that will be used inproduction welding. Changes to PQR are generally not permitted except in the cases of editorial correction to the entries or the case of an addenda being added. All changes in PQR would call for a requalification. When more than one welding process or filler metal is used to weld a test coupon the deposit weld metal thickness of each process and filler metal would be recorded. Several WPS, may be prepared from the data on a single PQR (eg. a 6 G plate PQR may support WPS for the F, V, H and 'O' positions on plate or pipe within all other essential variables). A single WPS may cover several essential variable changes as long as a supporting PQR exists for each essential and supplementary essential (when required) variable (eg. a single WPS may cover a thickness ranging from 1.6 mm through 32 mm if PQRs exist for both 1.6 mm and 5 mm through 32 mm thickness ranges).


Related Discussions:- Scope of wps and pqr

Gas metal arc welding (gmaw), GAS METAL ARC WELDING (GMAW) GMAW is abbr...

GAS METAL ARC WELDING (GMAW) GMAW is abbreviation for Gas shielded Metal Arc Welding. Here fusion is achieved by an electric arc formed between work piece and process is called

What is the use of ball race drive, (a) What is the use of ball race drive?...

(a) What is the use of ball race drive? (b) How should one install the bottom cone race? (c) What is the use of front fork oil seal driver body and its attachment? (d) Wha

Thermodynamics, describe equivalence of kelvin planck and clausious stateme...

describe equivalence of kelvin planck and clausious statement

Thermodynamics, how to prove that heat and work is path function?

how to prove that heat and work is path function?

Enumerate about the loading conditions, Loading Conditions Non-uniformi...

Loading Conditions Non-uniformity of loading has to be considered in the choice of foundations particularly in highly compressible soils. It is not uncommon for buildings with

Uphill pulley and release back system, I was wondering if anyone could help...

I was wondering if anyone could help me design an aid for my pet rat that has hind leg degeneration. I have a long slope where i can train him to climb on some kind of trolley and

New rule with local one step ahead prediction: wls rule, New Rule with Loca...

New Rule with Local One Step Ahead Prediction: WLS Rule Along with an observation to improve the performance measure of the system, a dynamic posteriori rule, the WLS that is

Determine the value of registers, The ARM microprocessor has 32 bit instruc...

The ARM microprocessor has 32 bit instructions and 32 bit registers. Explain why this means that immediate addressing cannot be used to load a register with a 32 bit constant. T

Line of action of force, Line of action of force: Sol.: The directio...

Line of action of force: Sol.: The direction of force along the straight line through its point of application, in which force tends to move body to which it is applied. Thi

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd