| A WPS is a document that describes how welding is to be carried out in production. They are recommended for all welding operations and many application codes and standards make them mandatory
What information should they include?
Sufficient details to enable any competent person to apply the information and produce a weld of acceptable quality. The amount of detail and level of controls specified on a WPS is dependant on the application and criticality of the joint to be welded.
For most applications the information required is generally similar to that recorded on a Procedure Qualification Record (PQR) or Welding Procedure Approval Record (WPAR), except that ranges are usually permitted on thickness, diameters, welding current, materials, joint types etc.
If a WPS is used in conjunction with approved welding procedures then the ranges stated should be in accordance with the approval ranges permitted by the welding procedure.
However careful consideration should be given to the ranges specified to ensure they are achievable, as the ranges given by welding procedure standards do not always represent good welding practice. For example welding positions permitted by the welding procedure standard may not be achievable or practical for certain welding processes or consumables |
have procedures to cover the following
- BS 2971 Class 2 Arc Welding of Carbon Steel Pipe work {Gas Pressures less than 17 barg}
- BS 2633 Class 1 Arc Welding of Carbon Steel Pipe work
- BS 4677 Arc Welding Of Austenitic Steel Pipe work.
- BS 806 Boiler Pipe Work (Refers to BS 2971 and BS 2633)
- PD 5500 Unfired Pressure Vessels (Formally BS5500)
- BS 2790 Shell Boilers
- BS 1113 Water Tube Boilers
- BS 5169 Air Receivers
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