What are the general guidelines available to define TMLs for high pressure piping?
Please provide references from American & EU codes & standards.
TMLs Selection for High Pressure Piping
Re: TMLs Selection for High Pressure Piping
API 570 does not specifically talks about high pressure piping.
In most plants, inspectors usually classify high-pressure piping under critical service or Class 1 piping or high consequence piping circuits.
That classification then drives shorter intervals, more TMLs, stricter repair approvals, tighter corrosion allowances, and more advanced NDT coverage.
In most plants, inspectors usually classify high-pressure piping under critical service or Class 1 piping or high consequence piping circuits.
That classification then drives shorter intervals, more TMLs, stricter repair approvals, tighter corrosion allowances, and more advanced NDT coverage.
Re: TMLs Selection for High Pressure Piping
ASME does have a separate section K on high pressure piping however such exclusivity is not available in API 570 when it comes to inspection.
I am not very well familiar with EU codes on this.
All we may need to consider is the areas where there is more turbulence, erosion-corrosion. Elbows, bends, reducers, and injection points should be considered points of concerns when defining TMLs on high pressure piping however understanding with ASME B31.3 about defining rules of design for high pressure piping does not necessarily correlate with API 570 service based /class defined inspection code.
I am not very well familiar with EU codes on this.
All we may need to consider is the areas where there is more turbulence, erosion-corrosion. Elbows, bends, reducers, and injection points should be considered points of concerns when defining TMLs on high pressure piping however understanding with ASME B31.3 about defining rules of design for high pressure piping does not necessarily correlate with API 570 service based /class defined inspection code.
Re: TMLs Selection for High Pressure Piping
In my opinion, there should not be any special focus to be provided to high pressure piping while performing inspection.
Once classified appropriately, and CMLs are assigned accordingly based upon the rules provided in API 570, I believe we are all covered.
Once classified appropriately, and CMLs are assigned accordingly based upon the rules provided in API 570, I believe we are all covered.