Fabrication must comply with AS 4458 for manufacture and AS 3992 for welding qualifications.
Uses AS 4037 for NDE criteria. Class 1 piping often requires 100% NDE for critical welds. How to Access the Full Standard as 4041 pressure piping pdf
AS 4041 provides a list of pre-qualified materials and refers to other standards for welding and NDE procedures. Fabrication must comply with AS 4458 for manufacture
Land steam boilers, prime movers, and refrigeration systems. and refrigeration systems. No service limit
No service limit; requires the highest weld quality and 100% non-destructive examination (NDE) for specific thicknesses.