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Thanks for the response. With reference to concrete slabs, was it concrete saddles to counter balance buoyancy?. Can that be used in this situation as we have soil subsidence below the oil pipeline.

Thank you for your response. -Water pipelines are DUctile iron pipes. and installed way prior to oil line installation. It was installed by Thrust boring technicque. - Leakage is from collar of Ductile iron water pipe which is below CS oil pipeline. - If the soil below the oil pipeline is...

Thank you so much for the response. Yes, I will upload the plan and cross section. Overburden pressure - Oil pipeline is at a depth of 1.2 m from ground level and water pipeline is at a depth of 6 m from ground level and the leak is from Water pipeline which is 4.5 m approx below the oil...

Here we have an issue with recently oil pipeline. pipeline 20" oil pipeline crosses water pipeline (1000mmx3 nos) corridor Oil pipeline encounter settlement caused by leakage of water pipeline passing under 20" oil pipeline. Water pipeline is 4 m below crude oil pipeline. The ground...

Thanks a Lot LittleInch.. You are absolutely correct. The operations team are apparently well known for creating hurdles where there is no issues at all..

Hi LittleInch, Thanks for the response. For intelligent pigs its being tracked with MFL technique. Yes, As you pointed out, our pipeline crosses existing pipeline corridor at a depth of not less than 2 m from grade level and 600 mm min beneath existing pipes. Also you rightly pointed out...

Hello Members, Currently, there was a observation/clarification from operations stating that 20" buried Gas pipeline crosses many other pipelines and hence it will be difficult for pig tracking. Project is under finalisation stage in terms of routing and operations and stating this comment. We...

Hello, Its one culvert with 3 Pipelines in it. Will share the drawings too. The culverts are in bad shape. These pipelines inside the box culverts are supported by sleepers.

Hi All, We have an existing culvert which carries 3 pipelines of 6" crossing an Asphalt road. These culverts are to be replaced . What precautions should we take to protect the pipes under road while replacing the culvert. The pipes are kept at a separation of 1 m from each other.

Hi Dear Members, We have a Pipeline system which is 64” which is designed as per ASME B 31.4 design code. Would like to know if the flanges for this pipeline system can be designed as per ASME Sec VIII Div I by providing design parameters to vendor. Or is there any other design code to be...

Thanks Littleinch for the clarification.. Yea, as u said... it is meaningless to provide interlock of there is no followup action. We are trying to get the client convinced regarding the smatter. Regards, J

Thanks Littleinch and Zdas04 for the clarifications. As the drawing depicts...the kicker line nozzle N8A which will be connected to Point B... Our main question arises , in any case if we have to provide an interlock for kicker line which valve should be provided the interlock.. I believe it...

Thanks Littleinch, true that 100% safe operation of pig is impossible. The sketch of PIG Trap is attached for reference

Hi LittleInch and zdas04, Thanks for the response. As client is insisting to provide these interlock sequence, we have have informed them accordingly that sequencing operation will be 100% safe only if you interlock all the associated valves rather than providing only for Kicker line and main...

Hi All, Do we need to provide key interlock for Mobile Pig Traps... Pig trap Size is 10" x 6".. As per Company only the main line valve and kicker line valve to key interlocked. This mobile pig trap will be used for 10 flow lines...and there are existing flow lines in the field another 15 not...

Thanks Little Inch for the valuable explanation.. Will put a snap shot of our arrangement. We had run an analysis for the system and we could find that the expansion we are getting at the pig trap is 28 mm and as per client requirement it shall be not more than 25 mm. We have tried increasing...

Dear All, Apologies for the delayed response as I was on medical leave for week. Little Inch: from here on I will be participating in all forums related to pipelines. Regarding the question, the pipe is buried and and the operating temp is 78 deg celciuis. We have done an analysis in Caesar...

Hello All, Currently we are designing a pipeline 12" CS (API 5l X 52) with a design pressure of 140 barg and design temperature of 93 deg c. The length of the pipeline is 1.6 km. We wanted t o remove the requirement of Anchor block. currently we are trying to change the routing to station...

Thank you all. As Littleinch asked.. yes it is pipeline ASME B31.4 code. Length of the pipeline is 5 km and we have 5 lines in parallel of same size 6". And as per route, we have road crossing at every 500 m. We want to mitigate the expansion loop or replace with other option. Regards, B

Hi All, Good Day! We have an aboveground pipeline 6" with design pressure of 140 barg and design temperature of 93 deg c. In order to make allowance for thermal expansion, expansion loops are proposed. However, in the handbook of Pipeline Engineering by Henry, there mentions about certain...