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mahara7a, You already have the answer. "we would normally use 12bar or 1.5 times working pressure for 24 hour as stated in contract requirement." This works for a short pipe and for a long pipe. What are you expecting that would cause a different answer? Sometimes its possible to do all the...

juanjogo, Do you have a specific problem you are dealing with or you working on a class project? Do you have a specific Commodity? Do you have a specific material for your piping system? Do you have a specific operating temperature? Do you have a specific Pressure and flow speed? Do you have...

gdn1984, Please draw us a picture of the routing with appropriate dimensions and locations of pipe anchors and guides. Sometimes its possible to do all the right things and still get bad results

processendbd, Try this: https://www.offshore-mag.com/business-briefs/equipment-engineering/article/16756572/major-advantages-to-siting-lng-plant-offshore Sometimes its possible to do all the right things and still get bad results

Jman69, You wrote the following: I have a situation where I have existing 6" std wall piping with a 6" 300# flange WN. The new compressor that came in has a 6" 900# flange. The solution is very simple: 1. You need to cut off your existing 6" Class 300 Flange. 2. Then you need to purchase a new...

Sawsan311, Typical, no detail data: - No Line sizes? - No Flange Ratings (Class 300, 400, 6oo, 900, 1500)? - No Commodity? So my answer is use Gate Valves for both upstream and downstream PSV isolation isolation. Sometimes its possible to do all the right things and still get bad results

Charles1111, You have a lot of folks offering advice, some good and some (maybe) not so good! I will offer my own. I started in the Engineering Field 1n 1954 and during the following years I heard lots of people use the term "KISS". This meant "Keep It Simple Stupid". When I apply this advice...

Nasim12345, Your post does not make sense to me, I will try to understand it. Issue: Saudi Aramco procedures, (for double PSV installations) require the downstream PSV outlet isolation valve must be kept open. Question: What is the reason behind this requirement? Discussion: If there are two...

Piet Freek, You have left out some important information: - Valve size? - Frequency of use? - System Design Pressure? - Service/Commodity? - Piping System Material? - Etc? Sometimes its possible to do all the right things and still get bad results

Mae1133, You need to consider "Wrench Clearance", talk to an experienced Maintenance Operator. Question: Why are your bolt holes oriented at the Nine O,clock and three O,clock positions? Sometimes its possible to do all the right things and still get bad results

Arun, Your question does not make sense. You can Socket Weld both thick and thin wall pipe it depends on which type of fittings you purchase. And, you can Butt Weld pipe and fittings of thick wall pipe or very thin wall pipe and fittings. It all depends on what you spec and buy. What you spec...

pianoman1, Unfortunately, this appears to be a time when all the advice you get, is not good advice at all! Sometimes its possible to do all the right things and still get bad results

Cardin/XL83NL, Is "Flex analysis for piping" the same "as Stress analysis for piping"? Or, is "Flex" the new term? When did it change? Who changed it? And, why did it change? Sometimes its possible to do all the right things and still get bad results

I agree with LittleInch, that is the only thing I have ever seen. Sometimes its possible to do all the right things and still get bad results

Long Sweep Fittings???? In my past, I never saw that term. I worked on a number of Projects over the years where "Long Radius Elbows" were required. The "pipe" was sometimes Aluminum and some time Stainless Steel The Bends Or Elbows were 3-diameter radius to 10-Diameter radius depending on the...

Physics_Nerd, I suggest you use some common sense. Any Diked area (around a storage tank) needs to have enough clear space and access for a work truck to enter and drive around. The "access" means a ramp on the outside of the dike, travel space over the top of the Dike, a ramp down the inside...

Spoonful I am now retired but was in Piping Design Engineering for 45 years which included most of my time in the design office, a few years as Engineering Manager in a Pipe Fabrication shop and lots of time in the field (job site). This condition (that you describe) never came up! Unless your...

Inspector89, You should give careful consideration to what LittleInch has told you. My thoughts include: 1) What size is the "Lube Oil" piping? (Some Lube Oil jobs involve tubing instead of pipe.) 2) "Lube Oil" sounds like the type of machines that includes lots of vibrations. 3) High...

Eduardo Jimenez, I never heard of a "Dart" Valve. Maybe it is a term used only in your industry. Maybe you should look at what we call a "Needle" Valve? Look through the images below and pick the one that looks good to you, (click around) see if you can contact the manufacturer for the...

Zul78289, Quick questions: 1, What is this system? 2, What is the size of the existing pipe? 3, What is the size of the new branch line pipe? 4, Are these pipes required to slope in the direction of flow? 5, What is the length of travel of this new pipe along side the existing pipe? 6, How is...