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What is the difference of the method of connecting platform jacket to pile between "grout annulus" and "crown shim"? Could anybody advise pros&cons of these method?

What is the difference between wet buckle and dry buckle during pipe laying? How to correct them?

I have some problem about breaking design pressure of the subsea gas pipeline. Our pipeline length is 600 km long, inlet and outlet pressure is 2500 and 700 psig. As you know, we don't want to design all 600 km pipeline with the design pressure of 2500 psig. So we need some equipment to break...

First, thank you very much for all suggestions. They're very helpful. Msmedesign, I have one point to discuss with you. About greasing / lubricating the ball valve before commissioning. Most vendor do recommend us don't grease valve. But in our experience, during gas in when commissioning, gas...

What factor should we consider for approval new ball valve (that we have been never used before) to our vendor list? In my opinion, because almost vendors have nearly same design, (except for distinctive features for some vendors, as rotating seat of Cooper Cameron), so it's difficult to judge...