Standard Specification for Common Requirements for Steel Flanges, Forged Fittings, Valves, and Parts for Piping Applications
Standard Practice for Ultrasonic Testing of the Weld Zone of Welded Pipe and Tubing
Plastrørssystemer til jordlagte trykløse afløb – PVC-U – Del 2: Vejledning til overensstemmelsesvurdering