Stainless steel fitting-PT test(Penetration test)

Date：2025-10-15 02:35:21 Visit：8

A stainless steel "penetration test" can refer to a liquid penetrant test (LPT) to find surface defects or a cone penetrometer test to measure the strength and moisture content of soil using a stainless steel cone. In materials science, LPT is a non-destructive test to find flaws open to the surface. For soil analysis, the cone penetrometer test determines the liquid limit by measuring the depth a stainless steel cone penetrates the soil at different moisture contents. 

Liquid penetrant testing (LPT)

Purpose: 

A non-destructive method to detect surface cracks, porosity, or other flaws in stainless steel.

Process: 

A liquid penetrant is applied to the surface, then removed. A developer is applied, which draws the trapped penetrant out of any defects, making them visible.

Application: 

Commonly used for stainless steel welds, flanges, and other components where surface integrity is critical.

Result: 

The presence of colored indications on the surface shows where defects exist.