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UNITOR WELDING HANDBOOK
4.04.02 Basic principles . . . . . . . . . . . . .
4.04.03 Plasma cutting equipment . . . .
4.04.04 UPC-310 TP . . . . . . . . . . . . . . . . .
4.04.05 UPC-1041 . . . . . . . . . . . . . . . . . . .
4.04.06 Cutting technique . . . . . . . . . . .
4.04.07 Maintenance and
trouble shooting . . . . . . . . . . . . .
4.05 Current Distribution System . . . . . . . . .
5 GAS WELDING AND CUTTING PROCESS & EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . .
445 446 447 451 454 456 459
463
5.01 Ac/Ox cutting, welding, brazing . . . . . 465
5.01.01 Introduction . . . . . . . . . . . . . . . . 466
5.01.02 The Combination Torch UCT-500 468
5.01.03 UCT-500 Components and
spares . . . . . . . . . . . . . . . . . . . . . 470
5.01.04 The Unitor Workshop Cabinet 472
5.01.05 Welding and grinding goggles 474
5.01.06 Accessories . . . . . . . . . . . . . . . . 475
5.01.07 Portable gas equipment . . . . . . 476
5.01.08 Gas hoses . . . . . . . . . . . . . . . . . . 479
5.01.09 Hose connectors . . . . . . . . . . . . 482
5.01.10 Gas regulators for cylinders . . 485
5.01.11 Flashback . . . . . . . . . . . . . . . . . . 487
5.01.12 Flashback arrestors . . . . . . . . . 488
5.01.13 The acetylene/oxygen flame . . 489
5.01.14 Operating instructions for
UCT-500 cutting torch . . . . . . . . 492
5.01.15 Cutting procedure . . . . . . . . . . . 494
5.01.16 Common cutting faults . . . . . . . 496
5.01.17 Operating instructions for
UCT-500 brazing, welding &
heating torch . . . . . . . . . . . . . . . 498
5.01.18 Maintenance of blowpipes . . . 500
5.01.19 Heating techniques . . . . . . . . . . 502
5.01.20 Flame straightening techniques 503
5.01.21 Welding techniques . . . . . . . . . 505
5.01.22 Butt joints for gas welding
of steel . . . . . . . . . . . . . . . . . . . . . 508
5.01.23 Consumables and parameters
for gas welding . . . . . . . . . . . . .
5.01.24 Soldering and brazing
techniques . . . . . . . . . . . . . . . . .
5.01.25 Edge preparation . . . . . . . . . . . .
5.01.26 Consumables and parameters
for brazing . . . . . . . . . . . . . . . . . .
5.02 Gas supplies and gas distribution
system . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.02.01 Introduction . . . . . . . . . . . . . . . .
5.02.02 Argon . . . . . . . . . . . . . . . . . . . . . .
5.02.03 Argon-Carbon Dioxide mixture
5.02.04 Carbon-Dioxide . . . . . . . . . . . . .
5.02.05 Oxygen . . . . . . . . . . . . . . . . . . . . .
5.02.06 Acetylene . . . . . . . . . . . . . . . . . .
5.02.07 Rules & Safety precautions
for handling and use of Gas cylinders . . . . . . . . . . . . . . . .
5.02.08 Gas Distribution System for
Acetylene and Oxygen . . . . . . .
509
1.00
510 512 514 517 518 519 520 521 522 524 528
530
6 MISCELLANEOUS INFORMATION . . . . . . . . .
535
5.04 International system of units . . . . . . . . .
5.05 The Greek Alphabet . . . . . . . . . . . . . . . .
5.06 General conversion factors . . . . . . . . . .
5.07 Roman numerals . . . . . . . . . . . . . . . . . . .
5.08 Metric and decimal equivalents
of fractions of an inch . . . . . . . . . . . . . .
5.09 Wire cross section AWG/mm2 . . . . . . .
5.10 Common gauge series for sheet
thickness and wire . . . . . . . . . . . . . . . . .
5.11 Physical properties of some
elements . . . . . . . . . . . . . . . . . . . . . . . . . .
5.12 Hardness comparison table . . . . . . . . .
5.13 Corrosion of galvanic couples in
sea water . . . . . . . . . . . . . . . . . . . . . . . . .
5.14 Temperature scales . . . . . . . . . . . . . . . .
5.15 Pressure variations related
to temperature . . . . . . . . . . . . . . . . . . . . .
5.16 Abbreviations and welding
terminology . . . . . . . . . . . . . . . . . . . . . . . .
536 537 538 539 540 540 541 542 543 544 546 547 548
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