Scope of wps and pqr, Mechanical Engineering

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).

Posted Date: 9/18/2012 1:37:09 AM | Location : United States







Related Discussions:- Scope of wps and pqr, Assignment Help, Ask Question on Scope of wps and pqr, Get Answer, Expert's Help, Scope of wps and pqr Discussions

Write discussion on Scope of wps and pqr
Your posts are moderated
Related Questions
give me the solutions for higher engineering mathematics by bs grewal

what is boiler ? what is hard & soft water? how can we convert raw water into soft water?

Sialons Mixture of silicon nitride, aluminium nitride and alumina is hot pressed to acquire a product largely called as sialon. In the resulting product the structure has part

Combined Rules           MOD (modified operation due date)                                 PN j = max (t + o j , t dj ) (SPT-Tr) (Truncated SPT)

(a) Illustrate Torsionally Equivalent shaft. (b) Determine the natural frequencies and mode shapes for the system shown in figure I 1 = 10 Kg -m 2 I 2 = 40 Kg -m 2

Calculate the support reactions of beam: Q: Bending moment diagram (BMD) of the simple supported beam can be given as shown in figure given below. Calculate the support reac

Cylinder Bore: The nominal inner diameter of the working cylinder is called the cylinder bore and is designated by the letter D and is usually expressed in millimetre (mm).

Draw bending moment diagram for the beam: A cantilever beam carries a uniformly distributed load of 2 t/m over the total length of 6 m and point loads of 5 t, 3 t, 7 t & 2 t a

Advantages and Limitations of Adhesive Bonding The description so far might be concluded through listing main advantages of adhesive joints. (a) The adhesive joints assist

Q. Safety considerations in multi-unit plants? Segregation of process units within large or multi-unit plants is necessary in order to reduce the risk of a fire spreading. This