Recent content by Deepray

Hi Guys, Anyone have a copy of the above in pdf format? Looking for it high and low for the past few days but in vain. Hope someone here can help. Rgds

Hi Guys, I am wondering what is the diff in the above. I am deciding on a subsea valve material and understand that A350 has so my diff classes of materials. How do i know which one to use for my subsea tie-in? The pipeline is grade x60, does it mean i have to pick something with the same...

Hi, I need to look for the below for some checks. Can someone give me some directions on where i can find it? "Critical Crack Sizes in Ductile Piping" by Kastner W. International journal of Pressure Vessels and piping 1981; 9:197-219 Thanks alot

Thanks for all the answer. Appreciated. Cheers

Sjones, Can you please elaborate more? Does it mean a certain batch of steel plate made or line pipe. As we know the plate is made first and then plate are used to round into pipe and welded. So this 'heat' means the batch from the plate or pipe. Thanks

Hi, Any know about this HIC test and SCC test for sour service? Stated in latest API 5L, frequency of HIC test is "One test for each of the first three heats applied; thereafter, one test for each test unit of not more than ten heats of steel" Does anyone know what it means by heat apply? Are...

Its a new water injection pipeline that the Client are looking at converting it to oil line. From Design point of view, as long as the pressure and temperature is acceptable then it is fine. Not sure from material point of view. This is why the qns is rised.

Hi, Does anyone know about welding to be qualify as NACE? Recently i was told by someone that the old water pipeline my company designed is not suitable to be converted to Oil pipeline as the weld on the water pipeline offshore is not NACE. I have checked in many industrial code and have yet...

2 common location to have isolation joint for offshore system. - Top of riser flange at platform (between riser and topside piping flange tie-in) and - Shore approach; at tie-in location between onshore and offshore battery limit.

Sorry for the late reply. Just have time to log on and look at the topic. let me share my thoughts. Anchor block are usually necessary when it come to shore approach as water depth is shallow resulting in huge ENV loads on the pipeline. This will cause in stability to the pipeline. Anchor Block...

Could it be the problem from spiral pipeline? This is the 1st time i seen spiral pipeline used. Usually we use ERW,UOE line pipe.

This is not the case, only the riser end clamp will be isolated by means of neoprene. Nobody will isolate the brace end at the jacket end. Clamps is always protected by CP from the jacket in most cases; otherwise you will have your clamps, bolts and nuts corroded in no time.

You should worried so much about the corrosion allowance of the clamp as the clamp should be protected with CP system from the jacket. Its the type and thickness of coating on the clamp for the splash zone that you need to consider.

Thank you very much. I shall contact the vendor and check it out.!

Hi, I need some help regrading IP. Anyone have experience in IP? What is the maximum wall thickness different in a pipeline system allowed in order for the pig to go thru smoothly without have to change the pig OD etc. Rgds Ray