TJ Inspection provides individuals trained and certified to operate Massachusetts Material Technologies’ (MMT) Hardness, Strength, and Ductility testers. This process and equipment help clients meet the requirements of DOT §192.607 and the PHMSA Mega Rule for Traceable, Verifiable, and Complete (TVC) records without cutouts, or additional hydrotesting. This process can be utilized on both in service piping and piping that is not currently operational.
Ultimate Tensile Strength, Yield Strength, and Grade
- Data provided by the HSD tester is analyzed to provide a conservative UTS, Yield, and Grade.
Construction Method and ERW seam evaluation (high frequency, low frequency, PWHT)
- Pipe size, seam type, and ERW seam type are confirmed. By running the tester over an ERW seam, it can be determined if it is a high frequency weld, a low frequency weld, and if any post weld heat treatment was performed.
- Our certified technicians remove a small amount of material from the surface of the pipe and it is sent to a laboratory for chemical evaluation. Chemistry and carbon equivalent provided based on ICP-OES and combustion testing.
Metallographic Grain Structure Evaluation
- Microscopy is performed and the steel microstructure is evaluated for grain size and consistency.
All HSD Testing is performed with MMT’s HSD 8000 tester. The HSD8000 is the most up to date equipment used for MMT’s HSD Evaluation process. It can be utilized on:
- Grades A–Grade X70
- Vintages from 1920–Current
- Any seam type
- Yield of 29–80ksi
- Ultimate Tensile Strength 50–104ksi
- Yield/UTS of .56–.96