Preliminary Welding Procedure Specification

Customer Name: TATA POWER Document no:

Prepared by: Date: 06-01-2014

Welding Machine Description: CC welding machine

Base Metal: GS 17 CrMoV 5-1-1 Thickness: Tapered 8-14 mm

As per drawing

Preheat: 100C Interpass: 150C (max.)

PWHT: NA

Backing gas: NA

Joint Preparation: (Surface grinding preferably

using FF2 or M/c surface as required)

Filler Metal Brand Name: UTP 068HH

EN ISO 14172

AWS 5.11

E Ni 6082(NiCr20Mn3 Nb)

E Ni CrFe3 (mod) Heat No: -

Lot No: -

Run Process Filler Metal Dia. (mm) Welding

Position

Shielding Gas/Flux

First SMAW UTP 068HH

3.2 1G NA

Fill-up 4-0

Run

Current

polarity Current

(Ampere)

Voltage

(volt)

Travel

Speed(mm/

Min)

Wire Feed

inch/min

Pulsed

Arc

Energy

kJ/mm

First DCEP

70-95 24-28 80 mm/min NA NA -

Fill-up 90-120 24-28 80 mm/min NA NA -

Notes:

-Weld area and base metal should be clean and free of oil, grease and dust.

-Hold Electrode stick as vertically as possible, only very little weaving.

-Fill crater end carefully.

-For m/c surface at least 2 layers to be deposited.

-Re-dry Electrode for 2-3 hrs/ 250-300 C.

Prepared by: Manish Kumar

Approved by:

Amitabha Bhattacharya Head-Application

Technology