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1.1 This specification covers fittings, factory made from zirconium and zirconium alloys. The term welding fittings applies to butt-welding parts such as 45 and 90° elbows, 180° returns, caps, tees, reducers, lap-joint stub ends, and other types.
1.2 The values stated in either inch-pound or SI units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. SI values cannot be mixed with inch-pound values.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B493 Specification for Zirconium and Zirconium Alloy Forgings
B523/B523M Specification for Seamless and Welded Zirconium and Zirconium Alloy Tubes
B550/B550M Specification for Zirconium and Zirconium Alloy Bar and Wire
B551/B551M Specification for Zirconium and Zirconium Alloy Strip, Sheet, and Plate
B614 Practice for Descaling and Cleaning Zirconium and Zirconium Alloy Surfaces
B658/B658M Specification for Seamless and Welded Zirconium and Zirconium Alloy Pipe
ICS Number Code 77.150.99 (Other products of non-ferrous metals)
UNSPSC Code 40180000(Tubes tubing and tube fittings)