What is procedure specification?

What is procedure specification?

A Welding Procedure Specification (WPS) is the formal written document describing welding procedures, which provides direction to the welder or welding operators for making sound and quality production welds as per the code requirements . A WPS is supported by a Procedure Qualification Record (PQR or WPQR).

What is the meaning of WPS in welding?

Welding Procedure Specification
A Welding Procedure Specification, or WPS, is a document that serves as a guide for the effective creation of a weld that meets all applicable code requirements and production standards.

How do you prepare welding procedure specification?

Basic Information:

1. Name of the company and person who developed it.
2. Specification number and date.
3. Most WPS will be backed on a PQR (Procedure Qualification Record), you should refer to it in order to make it easy to trace the document back.
4. Number and date of the last revision.
5. Welding processes and type.

What is difference between PQR and WPS?

PQR contains the observations prepared from the test conducted on the manufactured products. WPS is used before the product is to be welded. PQR is used after the product has been welded and the tests have been completed. WPS is used by welders in industries, factories, and workshops.

Why do we need welding procedure specification?

A Welding Procedure Specification is essential for every welding company to have because it maintains quality standards across every weld. It isn’t just a nice guide to follow. Under various Australian and international standards (eg. ISO 15612, ISO 15609), a WPS is required to ensure a stable weld.

What are the steps of welding?

Step by Step Free Guide to Make the Right Weld using Arc Welding Machine

1. 1)Pre- welding processes.
2. 2)Wearing proper safety gear.
3. 3)Setting up your work area.
4. 4)Securing your workpiece.
5. 5)Striking the arc.
6. 6)Correct rod position and movement.
7. 7)Forming the bead.
8. 8)Cleaning and painting your weld.

What is WPS PQR WPQ?

WPS – Welding Procedure Specifications. PQR – Procedure Qualification Records, and. WQT / WPQ – Welder Qualification Test / Welder Performance Qualifications.

What comes first Pqr or WPS?

In simple terms: The WPS is written from the PQR. A PQR comes before a WPS.

What are the 5 essentials of welding?

WELDING PROCEDURES

• 5 essentials for proper welding procedures.
• 1) CORRECT ELECTRODE SIZE.
• 2) CORRECT CURRENT.
• 3) CORRECT ARC LENGTH or VOLTAGE.
• 4) CORRECT TRAVEL SPEED.
• 5) CORRECT ELECTRODE ANGLE.
• 8 FACTORS to consider in selecting arc welding electrodes.

  What are the 4 types of welding?

  There are four main types of welding. MIG – Gas Metal Arc Welding (GMAW), TIG – Gas Tungsten Arc Welding (GTAW), Stick – Shielded Metal Arc Welding (SMAW) and Flux-cored – Flux-cored Arc Welding (FCAW).

  What is the basic principle of welding?

  At a basic level, welding consists of using heat, pressure, or a combination of both to bond two pieces of metal together. If you were not familiar with welding, however, you would be surprised at the number of welding techniques out there and the science behind each of those methods.

  What should be included in a Welding Procedure Specification?

  A welding procedure specification shall contain, as a minimum, the specific essential and nonessential variables that are applicable to the welding process. When the referencing Code, standard, or specification requires toughness qualification of the welded joint, then applicable supplementary essential variables shall also be provided in the WPS.

  Do you declare procedures in the package specification?

  If you do not want some procedures to be publicly available you may not to declare them in the package specification. Declare them only in the package body. The cause of the error you are facing is declaration order of the procedures in the package body or lack of forward declaration.

  What are procedures, procedures and work instructions?

  A work instruction explains how to carry out the procedure. Consider a process as a high level, strategic method of control, in effect a summary of objectives, specifications, and broad resources needed. The procedure adds more specifics such as responsibilities, specific tools, methods, and measurement.

  What are some of the different types of specifications?

  Specifications of physical, mechanical, electrical and chemical properties and tolerances. Included in the design of physical things such as products. Descriptions of industry or internal standards. Detailing how things will work together such as a software API for system integration.