S9074-AQ-GIB-010/248 Rev 1
Upon joint agreement of AWS and NAVSEA, each SWPS-N is published by AWS (e.g., AWS-NAVSEA B2.1-1-1301:2018, Standard Welding Procedure Specification for Naval Applications (SWPS-N) for Gas Tungsten Arc Welding of Carbon Steel (S-1), 1/8 inch (3mm) through 1-1/2 inch (38mm) Thick, MIL-70S-2, in the As-Welded or PWHT Condition, Primarily Plate and Structured Naval Applications). SWPS-Ns are permitted to be used by an activity upon successfully completing and reporting a verification test weld (see Appendix C). Qualification of SWPS-Ns is not required provided toughness is not required for the intended application (see C-1.1). 3-2.18 TEMPERATURE CONTROLLED AREA (TCA). TCAs are areas close to production weld joints where temperature rise must be limited during welding to avoid degradation of properties or other features. These areas include bi/tri-metallic transition joints (e.g., explosive or roll bonded material for transitioning between aluminum and steel plating, and similar products of other alloys/applications, excluding tube welds to roll/explosive bonded-type tubesheets), and other areas specifically required by NAVSEA to be qualified as a TCA in accordance with this document. 3-2.19 TUBE-TO-HEADER SEAL WELD. Tube-to-header seal welds are a particular type of weld between various types of boiler tubes and their respective headers (or drums), such as economizer headers or superheater headers. These welds are located on the interior of the header (or drum) where integrity is usually provided by a combination of welding and rolling the tube. 3-2.20 TUBE-TO-TUBESHEET WELD. Tube-to-tubesheet welds are welds between tubing (usually heat transfer tubing) and the respective tubesheet usually occurring in some type of heat exchanger (see also 3-2.19). 3-2.21 WAVEFORM CONTROLLED WELDING. Waveform controlled welding is a welding process modification of the voltage wave shape, current wave shape, or both, to control characteristics such as droplet shape, penetration, wetting, bead shape, or transfer mode(s). 3-2.22 WELD DEPOSITED PAD. A weld deposited pad is a weld which is built up by a sequence that is essentially normal to a pressure boundary or non-pressure boundary surface; it is a type of surfacing (i.e., build-up). 3-2.23 WELDING SPEED (TRAVEL SPEED). Welding speed is the rate of progression of the welding arc along the weld axis. 3-2.24 WIRE FEED ANGLE. Wire feed angle is the angle between the filler metal and the tangent to the pipe or plate surface at the arc. 3-3 TERMS RELATED TO BRAZING. 3-3.1 BRAZEMENT. A brazement is an assembly whose component parts are joined by brazing. 3-3.2 CLEARANCE. Clearance is the actual gap, at room temperature, prior to brazing for capillary flow of filler metal. 3-3.3 MANUAL TORCH BRAZING. Manual torch brazing is torch brazing with the brazer controlling the torch by hand. 3-3.4 MECHANIZED TORCH BRAZING. Mechanized torch brazing is torch brazing with an automatic or mechanical method of controlling the torch while brazing. 3-3.5 PEEL TEST. A peel test is a destructive method of inspection where a lap joint is mechanically separated by peeling (see figure 7-20). 3-3.6 PREPLACED BRAZING ALLOY. A preplaced brazing alloy is any form (shims, wire, rings, and so forth) of brazing alloy that is placed in a joint prior to brazing.
3-4
Made with FlippingBook - Share PDF online