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
. Think of a WPS as a recipe for welders.
Why is a weld procedure qualification test necessary?
The welding procedure is an important part of the overall welding quality system, as it provides
documented evidence that inspection and testing has been performed to ensure that welding can be conducted to meet a recognized standard
.
What does a welding procedure specify?
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 pre Welding Procedure Specification?
A document containing the required variables of the welding procedure which has to be qualified
.
What is the main aim of welding procedure qualification in a test to ascertain?
3) The principal purpose of a welder qualification test is to:
Test the skill of the welder
. ( answer ) Assess the weldability of the materials.
Why do welding procedures expire?
Welding Procedure Specifications may be given an expiration date based on their Procedure Qualification Records
, in accordance with – American Welding Society's AWS D 1.5. Approved Welding Procedure Specifications may be used by the fabrication facility until they expire.
Which comes first WPS or PQR?
In simple terms: The
WPS is written from the PQR
. A PQR comes before a WPS.
Who is responsible for the qualification of welding procedures?
The engineer in charge of the project
provides the final approval to qualification documents, but he or she need not be the one administering the tests, performing visual inspection and conducting mechanical tests.
How do you prepare Welding Procedure Specification?
- Name of the company and person who developed it.
- Specification number and date.
- 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.
- Number and date of the last revision.
- Welding processes and type.
Is code for Welding Procedure Specification?
This Indian Standard which is identical with
ISO 15607 : 2003
‘Specification and qualification of welding procedures for metallic materials — General rules' issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Welding General …
Is welding a special process?
Welding is considered as
a ‘Special Process
‘, which means that its quality cannot be readily verified and its successful application requires specialist management, personnel and procedures above and beyond those that are considered for general quality systems such as ISO 9001.
What are the 5 essentials of welding?
- 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.
Is welding considered a special process?
Welding has
always been considered a ‘special process
‘. The quality of a weldment, in its entirety, cannot be determined through any amount of fancy inspections.
What is the main aim of welding?
The basic purpose of welding is
to join two elements together with a firm connection
. Welders typically work with metal or thermoplastic and use durable filler material to bind them together.
How do you evaluate welding?
- Check weld against code and standards.
- Check size with gauges and prints.
- Check finish and contour.
- Check for cracks against standards.
- Look for overlap.
- Check undercut.
- Determine if spatter is at acceptable levels.
How testing of welds are done explain them?
Welds can be tested by
destructive and non-destructive techniques
. Most production is tested by use of non-destructive methods. The most common non-destructive tests to check welds are Visual Inspection, Liquid Penetrant, Magnetic Particle, Eddy Current, Ultrasonic, Acoustic Emission and Radiography.
