Assessment life by cycle on FRP Pipeline - ASME B31.3 6
Dec. 23, 2024
Assessment life by cycle on FRP Pipeline - ASME B31.3 6
One project I was involved in actually measured the strain at bends and then decided to reinforce the fittings, or not.
FRP is such a nightmare contractually for in plant product. You have to lock into a supplier so you can do the design. This leaves you exposed to cost blow out. You need to ascertain the prime cost of fittings beforehand. Estimate the quantum and cost the job. Then you can enter into an alliance type contract. Always insist on open book so you can see the actual costs.
Be wary of the negative pressure capability of FRP. FRP products do not always meet full vacuum criteria. If you have pump trips then your waterhammer analysis will tell you if column separation is going to occur and what your negative pressures are likely to be.
"Sharing knowledge is the way to immortality"
His Holiness the Dalai Lama.
I did come across some work by Norska on the SIF valvues of FRP fittings. These fittings are commonly hand laid up, particularly for the larger sizes. The wall thickness is uncontrolled and thus the flexibility expected does not eventuate. It would appear the manufacturers think thicker is better.One project I was involved in actually measured the strain at bends and then decided to reinforce the fittings, or not.FRP is such a nightmare contractually for in plant product. You have to lock into a supplier so you can do the design. This leaves you exposed to cost blow out. You need to ascertain the prime cost of fittings beforehand. Estimate the quantum and cost the job. Then you can enter into an alliance type contract. Always insist on open book so you can see the actual costs.Be wary of the negative pressure capability of FRP. FRP products do not always meet full vacuum criteria. If you have pump trips then your waterhammer analysis will tell you if column separation is going to occur and what your negative pressures are likely to be."Sharing knowledge is the way to immortality"His Holiness the Dalai Lama.
FRP Pipe Installation
Please note, this is a technical article describing the steps to a successful FRP joint installation. If you are looking for information on RPS Field Service installation, please visit the Field Service page.
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In our previous article, we looked at basic principles for designing and fabricating supports for an FRP piping system. In this, our final article in the series, we are going to take a look at installation of FRP piping systems.
While installation might not typically be considered as part of the pipe system design, it is such an important part of a successful system that we believe it needs to be emphasized here. Without doubt, more issues arise in FRP piping systems due to improper installation than due to any other single cause. There are a number of steps that must be followed to provide assurance that problems wont arise later, and also to comply with the requirements of ASME NM.21.
The company is the world’s best Frp Pipe Fittings supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.
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