Construction of staple lok Fittings may be made by forging, cold heading or machining from bar stock. Carbon steel fittings fabricated from multiple yield and tensile strength per 4.1.1 shall apply. components may be bonded together by copper brazing, silver brazing, welding or other suitable processes.
Female clip fastener size fittings as follow:
The male staple-lock nipple shall be manufactured from 1.0718 steel per EN10277-3 (Bright
steel products. Technical delivery conditions. Free cutting steels), minimum tensile 345 Mpa,
minimum UTS 200 Mpa.
Note: All male and female 420 bar rated nipples and couplers shall be constructed from one (1)
piece forgings, cold headed or machined from bar stock. Fittings fabricated from multiple
components are not permissible without written approval by customer engineers.
