Skills Proficiency awards in Basic Fabrication ... - City & Guilds

2.49 Mechanical pipe connections and their applications.
Pipe connections: screwed joint types, pipe thread types, parallel and taper
threads, pipe preparation, use of screwed fittings, flanged joints (ie the use of
screwed-on and weld-on flanges), gaskets (ie types and materials)
2.50 Components of pipework systems and applications: valves, pumps, traps,
bellows and expansion bends.
2.51 Welded pipe connections, methods of welding.
Connections: applications, edge preparation and tacking procedures, use of
weldable fittings: elbows, bends, tee pieces, techniques for butt welds in steel
pipes up to 90mm nominal bore
2.52 Inspection and testing of pipework.
Inspection and testing: dimensional checking (ie ovality, buckles, sand
adhesion, flange squareness, hole positions [on and off centre], quality of pipe),
hydraulic testing
2.53 Pipe bending methods, tools and equipment.
Methods and tools: cold bending springs, use of formers, mandrels, gripback
plates, clamps and wiper dies (ie compression bending with and without filling,
draw bending), hot bending, use of low metal temperature fillers; methods of
cooling, effect of inadequate filling (ie low melting point alloys, resin, pitch, sand)
2.54 Reasons for preheating and post heating pipe.
Pre- and post heating: temperature ranges for different metals, holding
period and cooling rates, stress relieving: methods used
2.55 Types of support for fabricated pipework.
Support: u-bolts, hangars, rollers, anchors, girder/beam clamps, guides
Skills Proficiency awards in Basic Fabrication, Welding and Pipework
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