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Dear Sirs, Please let us know the conclusion of HDPE butt joint quality assesemnt when a sample failed during reverse bend back test at field. We used to this test at field(s) to ensure fusion parameters and machine readiness before start of production joints in every day. At fusion, site...

Dear Sirs, Please let us know the conclusion of HDPE butt joint quality assesemnt when a sample failed during reverse bend back test at field. We used to this test at field(s) to ensure fusion parameters and machine readiness before start of production joints in every day. At fusion, site...

We use polyethylene (HDPE-100 Grade)pipes as internal corrossion protection for carbon steel pipes in water injection and crude oil applications. I would like to know what will be pull force at expansion loops / curves while pulling PE Liner from one end to other end. Is Capstan Effect formula...

We use polyethylene (HDPE-100 Grade)pipes as internal corrossion protection for carbon steel pipes in water injection and crude oil applications. I would like to know what will be pull force at expansion loops / curves while pulling PE Liner from one end to other end. Is Capstan Effect formula...

Hi! I would like to know the importance of NDE (UT & RT) tests in HDPE Pipes and fittings joined by butt-fusion, extrusion or electrofusion methods? Is it necessary to check the all joints with NDE testing when joining method followed based on standard parameters (like fusion material, temp...

Dear Pat, The test used to know the oxidation stability of material at process parameters (190 - 220 Deg.C). During processing at that temperaure material exposed to oxygen with ambient atmosphere at different phases. So,it should not get oxidized easily. For that antioxidants used by material...

Dear Sirs, Is Thermal Stability required more than 150 minutes for a HDPE Pipe at 200 Deg.C? ASTM D 3895 - 07 mentioned Oxidatin Induction Time (OIT) for HDPE material / pipe is more than 150 minutes at 200 Deg.C, Whereas all other internaltional standards ISO 4427, EN 12232 etc, giving OIT for...

Hi James, Thansk for your response. The application is in PE pipelining for carbons steel spools. PE lining used as corression protection purpose. so, the pressure will be taken care by CS pipe and pressure varies from 30 bar to 100 bar based on application & CS pipe. Evnthough for design of...

If the pipe size is 0.75", you can get 1500 feet in a sigle roll, in fact upto 3300 feet also can give in a sigle roll. Ask your manufactuerer's to provide the total quantity in a single roll, if it is possible you may not have other problems.

Hi! We design HDPE Stubend(s) for use of HDPE Lined carbon steel pipelines application. We provide stubend collor thickness (flange face thickness) double of pipe thickness. In recent conversations, we came to knew stubend flange face thickness 1 to 1.5 times of pipe thickness is sufficient...

Hi! We design HDPE Stubend(s) for use of HDPE Lined carbon steel pipelines application. We provide stubend collor thickness (flange face thickness) double of pipe thickness. In recent conversations, we came to knew stubend flange face thickness 1 to 1.5 times of pipe thickness is sufficient. We...

Dear Pat, Thanks for information provided and I would like to inform you that the exposure medium was only potable water bought for testing purpose. RAM

Dear Demon, Thanks for your message. We would like to inform you that there was no scratches on failed pipe surface and it's new pipeline. There was no dimensional defect for the pipe. The design pressure was 16 bar and field testing pressure was 1.25 x DP (i.e 20 bar). Due to high temperature...

Dear Sirs, When we were conducting field pressure testing for 110mm SDR11 HDPE Pipe, it was failed at low pressure i.e 3.0 bar during pressuization. The test pressure was 12.0 bar for 4 hours according to pressure reduction factors with temprature. The temprature was around 50 Deg.C during...

Dear Friends, In a project, we have done Polyethylene Pipe Lining for carbon steel pipes and sucessfully tested for hydrotest at 74.10 Bar (1.5 x MAWP)with potable water. Now, During commissioning customer is asking to do the pressure test for the line with Nitrogen gas at 34.0 bar? We would...

Dear Friends, In a project, we have PE Lined carbon steel pipes and sucessfully tested for hydrotest at 74.10 Bar (1.5 x MAWP). Now, During commissioning customer is asking to do the pressure test for the line with Nitrogen gas at 34.0 bar? We would like to know can we test the above PE Lined...