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WPS

This document provides a welding procedure specification for a fillet weld on a carbon steel base metal between 8-12mm thick using the shielded metal arc welding process. The root pass will be completed with 3.15mm diameter Lotherm 705 electrode in the flat position using a stringer bead technique. Subsequent passes will be completed in all positions using weaving with 3.15mm Lotherm 706 and 4mm Lotherm 707 electrodes. Welding parameters such as current, voltage, and travel speed are specified for each pass.

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Balu Sukumar
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395 views2 pages

WPS

This document provides a welding procedure specification for a fillet weld on a carbon steel base metal between 8-12mm thick using the shielded metal arc welding process. The root pass will be completed with 3.15mm diameter Lotherm 705 electrode in the flat position using a stringer bead technique. Subsequent passes will be completed in all positions using weaving with 3.15mm Lotherm 706 and 4mm Lotherm 707 electrodes. Welding parameters such as current, voltage, and travel speed are specified for each pass.

Uploaded by

Balu Sukumar
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
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Main Supplier Address McNally Bharat Engineering Co. Ltd.

2B Ecospace Campus, 11F/12 , New Town , Rajarhat , Kolkata - 700156 Welding Process - SMAW Joint (QW-402) Joint Design : Fillet Weld Joint Backing : Yes No Backing Material (Type) : NA Metal Nonfusing Metal WELDING PROCEDURES SPECIFICATION (WPS) [ QW 200.1 ASME Section IX Boiler and Pressure Vessel Code]

Client - NTPC LTD Package - Ash Handling System for NTPC-BgTPP (3X250 MW) DOC NO - MBE/NTPC-BgTPP/WPS-CI : MS/001 REV NO - 0 Date - 21-02-2012 Page - 1 of 1

Types - Manual (Automatic , Manual , Semi-automatic)

'h' mm

NA NA

Nonmetallic Other

NA NA

'h' Shall be as per Drawing

Base Metal (QW- 403) P No - Unassigned Gr. No - Unassigned to or Specification Type and Grade - IS 210 FG 260 to IS 2062 Gr. A or Chemical analysis and Mechanical Properties to Chemical analysis and Mechanical Properties - NA Thickness Range Base Metal thickness Fillet : Unequal Thickness ( Max 25 mm) P No - Unassigned Gr. No - Unassigned

Filler Metal (QW - 404) Spec. No. (SFA) AWS No. ( Class ) F No. A No. Size of filler metal Deposited weld metal Thickness range Electrode-Flux (class) Flux trade Name Consumable insert Brand Name of Electrode

5.15 Lotherm - 705 NA NA 3.15 , 4 mm dia. CI Fillet 8 mm to 12 mm NA NA NA D&H Secheron

Position (QW - 405) Position (S) of Fillet - 3F Welding Progression UP - Up hill Down - NA Position(S) of fillet - All position Preheat (QW - 406) Preheat Temp. Inter pass Temp NA NA

Post weld Heat Treatment (QW - 407) Temperature range - NA Time range - NA

Gas (QW -408) Percentage Composition Gas(es) Mixture Flow rate NA NA NA NA NA NA NA NA NA

Shielding Trailing Backing

Electrical Characteristic (QW-409) Current - A.C / D.C : D.C Amps (range) : 65 - 140 amps Tungstan electrode size & type : NA Mode of metal transfer for GMAW : NA Technique (QW-410) String or Weave bead Oriface or Gas cup size Initial & Interpass Cleaning Method of Back Gouging Oscillation Contact tube to work distance Multiple or Single pass per side Travel speed range Peening Others

Polarity : Electrode (+VE) Volt range : 20-30 Volt

Root pass string method and subsequent passes by weaving method NA NA NA NA NA Multiple 50-125 mm/min. NA NA

Weld Layer

Process

Root Filling Final

SMAW SMAW SMAW

Filler Metal Diameter Class (AWS) (mm) Lotherm 705 3.15 Lotherm 706 3.15 Lotherm 707 4

Current Amp. Type of Range polarity (+ve) (+ve) (+ve) 65-105 65-105 90-140

Voltage

Travel speed range

Other (eg. Remarks , Comment , Hot wire addition , Technique , torch angle etc.)

20-24 20-24 23-30

50-70 100-125 70-100

Note : Filler pass and dia. Of filler metal depends on base material thickness Signature

MBE - QA & I

NTPC use

Approved by

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