Welding Procedure Specification:- Example

Welding Procedure Specification:- Example

Weld Procedure Number 30 P1 TIG 01 Issue A Qualifying Welding Procedure (WPAR) WP T17/A

Manufacturer: National Fabs Ltd 25 Lane End Birkenshaw Leeds  Location:  Workshop  Welding Process: Manual TIG  Joint Type: Single Sided Butt Weld Method Of Preparation  and Cleaning: Machine and Degrease Parent Metal Specification: Grade 304L Stainless Steel Parent Metal Thickness  3 to 8mm Wall Pipe Outside Diameter  25 to 100mm Welding Position: All Positions  Welding Progression: Upwards

Joint Design Welding Sequences   Run Process Size Of Filler Metal Current A Voltage V Type Of Current/Polarity Wire Feed Speed Travel Speed Heat Input 1 2 And Subs TIG TIG 1.2mm 1.6mm 70 - 90 80 - 140 N/A DC- DC- N/A N/A N/A    Welding Consumables:-  Type, Designation Trade Name:  Any Special Baking or Drying:  Gas Flux:  Gas Flow Rate - Shield:                          - Backing:  Tungsten Electrode Type/ Size:  Details of Back Gouging/Backing:  Preheat Temperature:  Interpass temperature:  Post Weld Heat Treatment  Time, temperature, method:  Heating and Cooling Rates*:  BS 2901 Part 2 : 308S92  No  Argon 99.99% Purity  8 - 12 LPM  5 LPM  2% Thoriated 2.4mm Dia  Gas Backing  5°C Min  200°C Max  Not Required Production Sequence   1. Clean weld and 25mm borders to bright metal using approved solvent. 2. Position items to be welded ensuring good fit up and apply purge 3. Tack weld parts together using TIG, tacks to at least 5mm min length 4. Deposit root run using 1.2mm dia. wire. 5. Inspect root run internally 6. Complete weld using 1.6mm dia wire using stringer beads as required. 7. 100% Visual inspection of completed weld

Revision History Date Issue Changes Authorization 26/11/2000 A First Issue Jack Straw    Jack Straw