Hawke Transit System catalogo

FRAME WELDING INSTRUCTIONSHawkeMarine Transit SystemIf necessary, to reduce thegap add weld material tothis face (not to the frame)BULKHEAD OR DECK1mm MAXHAWKE TRANSIT FRAMEThe aperture in the bulkhead/deck should be cut out such that the gap surrounding theframe 1mm.If gap is in excess of 1mm weld material may be added to the bulkhead/deck cut faceto reduce the gap. The bulkhead/deck should then be dressed and prepared aspreviously stated.TACK WELDS TO POSITION FRAMEAND HELP PREVENT DISTORTION.FOR MULTIPLE FRAMES 1 TACKWELD PER APERTURE SHOULD BEADDED TOP & BOTTOMWELDS (A) AND (B)FILET WELDS (C) AND (D)Welding Instructions for Mildand Stainless Steel FramesPrior to any welding process the jointand surrounding area should beprepared. The area must be clean,dry and free from any oil, grease,scale or oxide and any otherdebris/contaminates that may affectweld performancee.g. protective coatings andprimers.(B) UNDERSIDE(D) TOPSIDE(A) UNDERSIDE(C) TOPSIDEFRAMES THICKNESS(10 MM FORMARINE FRAMES)STARTz= 1 / 2 T up toz max= 6 mmfor higher values of zmore than one runof filled weld maybe requiredPrior to completing welds on either side of the bulkhead the frame should be tackedinto position as in the sketch above. The tack welds reducing the amount of distortionin the parent metals.The frame must be welded from both sides of the bulkhead.Welding Sequence1st (A) underside, 2nd (B) underside,3rd (C) topside, 4th (D) topsideNote: Allow adequate time for cooling to prescribed levels to prevent cracking betweeneach weld run. Weld runs should not start or stop at a tack weld but should run overa tack.www.hawke-hts.com23