If more stringent inspection is needed, MSS SP-55 can be paired with other standards like MSS SP-53 (Magnetic Particle) or MSS SP-93 (Liquid Penetrant). Procurement Information
– Sand trapped in the molten metal showing on the surface. mss sp-55 standard pdf
: For each defect type, the standard provides five examples: two that are acceptable and three that are rejectable . If more stringent inspection is needed, MSS SP-55
"If it passes SP-55, no NDT is needed." Fact: SP-55 is a visual standard. You still need MPI (magnetic particle) or PT (penetrant testing) for critical high-pressure applications. If more stringent inspection is needed
By adhering to this standard, manufacturers and purchasers can align expectations, reduce the risk of dangerous failures, and maintain a consistent level of excellence across every component.
– Voids caused by metal contracting during solidification.