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If during procurement of fired heater 180 Deg Return bends 2 min. wall thickness are specified for e.g. "Return Bend 180 SR 168.3 OD * 22.5 MW * 13.0 MW WP 22" What does it mean. Which min. thk shall be considered for acceptance of the procured material Thanks in Advance "j" "jmd"

What is the difference between QAP & ITP. Kindly attach some examples w.r.t. fabrication of piping/ storage tanks/ pressure vessels etc. Thanks in advance "jmd" "jmd"

Thanks. You suggestion looks much more practical & implementable. I will try it out. "jmd" "jmd"

Yes. All piping. However there is a priority list which requires critical high tempr. & high pr. HC piping to be attended 1st. "jmd"

Well friends What i am looking for is thumb rules, if there are any for quick estimation of the scaffolding quantity. I would like to know about general practice followed elsewhere like in other refineries, petrochemical or fertilizer plants "jmd"

We want to carryout out NDT inspection viz. UTG, visual of all piping & equipment in our plant. For that we need to estimate the approx. quantity of scaffolding that shall be required. One way is to calculate the plant floor area & multiply it by 1.5. However it is a very crude method & tends...