Transcription of WELDING PROCEDURE SPECIFICATION Shielded Metal Arc …
1 _____ Manual Alteration / Revision or Changes are Not Permitted WeldProc Page 1 of 12 WELDING PROCEDURE SPECIFICATIONWELDING PROCEDURE SPECIFICATION Shielded Metal Arc WELDING -SMAW WPS Number: WPS-SMAW-CS Revision: 0 Company Name & Address ABC WELDING & FABRICATING 123 WeldProc Boulevard Toronto, ON A1B 2C3 CWB Approval WELDING Engineer / WELDING Supervisor Approval Approved for Pages (1-12) _____ Manual Alteration / Revision or Changes are Not Permitted WeldProc Page 2 of 12 Table of Contents SCOPE.
2 3 WELDING PROCEDURE .. 3 BASE Metal .. 4 GENERAL .. 4 FILLER Metal .. 4 STORAGE AND CONDITIONING OF ELECTRODES .. 5 PREPARATION OF BASE Metal .. 7 PRE HEAT, INTERPASS TEMPERATURE, AND HEAT INPUT CONTROL .. 7 STRESS RELIEF HEAT TREATMENT .. 11 POSITION .. 11 ELECTRICAL CHARACTERISTICS .. 11 WELDING TECHNIQUE .. 11 WELD Metal CLEANING .. 12 QUALITY .. 12 TREATMENT OF UNDERSIDE OF WELDING GROOVE .. 12 ESSENTIAL VARIABLES.
3 12 _____ Manual Alteration / Revision or Changes are Not Permitted WeldProc Page 3 of 12 SCOPE This WELDING PROCEDURE SPECIFICATION (WPS) covers WELDING and related operations of steel structures fabricated in accordance with the terms outlined in the following reference standards: CSA CSA W59-13 Provisions of following AWS standards may also be applied provided relevant WELDING PROCEDURE Data Sheets have been supplied and approved by Canadian WELDING Bureau.
4 However, when the provisions of AWS Standard and CSA Standard conflict, CSA Standard takes precedence. AWS (latest edition) AWS (latest edition) A Change in any of the essential variables described in respective reference standard or detailed on WELDING PROCEDURE Data Sheets shall require a new WELDING PROCEDURE SPECIFICATION and / or WELDING PROCEDURE Data Sheet. The attached WELDING PROCEDURE Data Sheets (WPDS) are an essential part of this WPS. WELDING PROCEDURE The WELDING shall be done manually using Shielded Metal Arc WELDING , SMAW process.
5 Joints shall be made following the procedural stipulations indicated in CSA Standard W59-13 and may consist of single and multi passes in accordance with the approved WELDING PROCEDURE Data Sheet to which this SPECIFICATION refers. Joints may also be made following procedural stipulations indicated in AWS Standard AWS and AWS and may consist of single and multi passes provided WELDING PROCEDURE Data Sheets (WPDS) have been supplied and approved by Canadian WELDING Bureau (CWB). _____ Manual Alteration / Revision or Changes are Not Permitted WeldProc Page 4 of 12 BASE Metal The Base Metal shall conform to the SPECIFICATION of Steel Groups 1, 2, 3 of Table and Table of CSA Standard W59-13.
6 Other groups may be welded providing WELDING PROCEDURE Datasheets (WPDS) are accepted by CWB. Base Metal to be welded shall be as per CWB approved WELDING PROCEDURE Datasheet. Base Metal thickness from 3mm (1/8 ) to UNLIMITED THICKNESS may be welded under this SPECIFICATION provided respective WELDING PROCEDURE Data Sheets have been supplied and approved by CWB. GENERAL The welder or WELDING operator, the work, and the WELDING consumables shall be adequately protected against the direct effect of wind, rain, and snow, and all necessary means shall be provided to enable the welder or WELDING operator to work in reasonable comfort.
7 WELDING shall not be done when the ambient temperature is lower than 18 C (0 F) except with the express consent of the Contractor s Engineer. For pre-qualified joints, maximum electrode size, thickness of layers and maximum single pass fillet shall be as per Table of W59-13. FILLER Metal Electrodes certified by CWB to the requirements of CSA Standard W48 shall be used. SMAW classifications with no diffusible hydrogen designator or a diffusible hydrogen designator of H16 or less may be used for WELDING of all steels in Column 2 of Table of W59-13.
8 SMAW classifications with a diffusible hydrogen designator of H8 or less shall be used for WELDING of all steels in Columns 3 and 4 of Table SMAW classifications with a diffusible hydrogen designator of H4 shall be used for WELDING all steels in Column 5 of Table See also Clause of W59- _____ Manual Alteration / Revision or Changes are Not Permitted WeldProc Page 5 of 12 13 for steels in Column 5 of Table If notch toughness is a consideration for steels in that column, then electrodes having appropriate impact properties shall be selected.
9 Filler Metal shall be compatible with the base Metal , as specified in Table and of CSA Standard W59-13. Filler Metal for exposed, bare, unpainted applications of CSA 350A, 350AT, 400A, 400AT and ASTM A242 and A588 shall meet requirements of clause , and table of CSA standard W59-13. STORAGE AND CONDITIONING OF ELECTRODES Low-Hydrogen Electrodes All low-hydrogen electrodes shall be delivered in sealed containers or shall be reconditioned in accordance with (a), (b) or (c) below. If sealed containers show evidence of damage, electrodes shall be reconditioned in accordance with (a), (b), or (c) below.
10 Electrodes that have been wet shall be discarded. (a) Carbon steel electrodes conforming to CSA Standard W48 shall be baked for at least 2 hours at a temperature between 230 C (450 F) and 260 C (500 F) before being used. (b) Low-alloy steel electrodes conforming to CSA Standard W48 shall be baked for at least 1 hour at a temperature between 370 C (700 F) and 430 C (800 F). (c) Alternative baking temperatures for low-hydrogen electrodes may be used if such procedures have been developed and are recommended by the manufacturer; the use of these alternative procedures shall be approved by the Engineer.
