If you are about to purchase or open the PDF, here are the nine most critical clauses you must understand.
AS 4041 test pressure = 1.5 × design pressure × (Sₜ/Sᵣ)
Sₜ = allowable stress at test temp
Sᵣ = allowable stress at design temp as 4041 pressure piping pdf
But if design temp is high (creep range), they cap the multiplier.
Most B31.3 users forget this and over‑pressure their system. If you are about to purchase or open