What is WPS in welding PDF?
What is WPS in welding PDF?
A Welding Procedure Specification (WPS) is the formal written document describing welding procedures, which provides direction to the welder or welding operators for making sound and quality production welds as per the code requirements . A WPS is supported by a Procedure Qualification Record (PQR or WPQR).
What are the positions used in submerged arc welding?
The submerged arc welding process is a limited-position welding process. The welding positions are limited because the large pool of molten metal and the slag are very fluid and will tend to run out of the joint. Welding can be done in the flat position and in the horizontal fillet position with ease.
What polarity is used for submerged arc welding?
Submerged arc welding is similar to MIG/MAG, with DCEP being the most commonly used polarity, but DCEN is seen more often in this process, particularly for surfacing applications, where reduced penetration and dilution with the substrate is preferred.
How do you write PQR and WPS?
Basic Information. Most WPS will be backed on a PQR (Procedure Qualification Record) and this information should always be stated in the WPS. All you need to do is reference the PQR number which will allow any reader of your WPS to trace back to the original qualifying document.
What is process of submerged arc welding?
Submerged Arc Welding (SAW) is a joining process that involves the formation of an electric arc between a continuously fed electrode and the workpiece to be welded. A blanket of powdered flux surrounds and covers the arc and, when molten, provides electrical conduction between the metal to be joined and the electrode.
What flux is used in submerged arc welding?
The molten weld and the arc zone are protected from atmospheric contamination by being “submerged” under a blanket of granular fusible flux consisting of lime, silica, manganese oxide, calcium fluoride, and other compounds.
What polarity do you stick weld on?
In most cases, DC is the preferred welding polarity. Whether it is DC+ (electrode positive or “reverse”) polarity or DC- (electrode negative or “straight”) polarity, DC produces smoother welding output than AC.
Is it necessary to apply pressure in submerged arc welding?
Submerged arc welding does not require added pressure to weld because it is already generated by the electrode. This application is excellent for quickly welding together thin metal sheets and creates a secure fusion between welds.
What are the procedures for submerged arc welding?
The procedures included the single pass one-sided welding (OSW) onto flux copper backing (FCB) and one pass per side two sided welding no with backgouging techniques, both in a tandem arrangement. BMT Fleet Technology Limited 6134C.FR Qualification of SAW Consumables and Procedures to ABS Rules 2
What are the AWS welding procedure specifications ( WPS )?
Each of the WPSAmerica .com prequalified welding procedure specification has practical weld parameters, right shielding gases for spray, short circuit or globular mode of transfers, with helpful notes, technique or code’s rules, based on the latest edition of AWS codes.
What is the sample of Welding Procedure Specification?
Sample of WELDING PROCEDURE SPECIFICATION (WPS) Sample ofWELDING PROCEDURE SPECIFICATION (WPS) COMPANY NAME BY WPS No. DATE WPS REV. No. REV. DATE SUPPORTING PQR Nos.
What kind of filler metal can be used in WPS?
WPS Base Metal P-Numbers Allowed by PQR: Any metals of the same P-No. 4, plus combination between any metal from P-No. 4 to any metal from P-No. 3 or P-No. 1 (ASME Section IX, QW-424) Qualified WPS Filler Metal Allowed by PQR: Only Filler Metal categories with the same F-number and same A-number tested in PQR.