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  • Users: ek4putr4
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  1. ek4putr4

    Piggyback pipeline (HPHT) with High Voltage power cable

    Has anyone ever design or install pipeline with piggybacked High voltage power cable? If yes, what is the limitation? We have one HPHT pipeline (171 bars design pressure and 150 degC design temperature. And someone wanted it to have high voltage power cable to be installed piggyback with that...
  2. ek4putr4

    Prohibition of Reinforced Thermoplastic Pipe for Offshore Pipeline (Liquid & Gas Hydrocarbon)

    Refer to ASME B31.4 Chapter IX section A423.2 and ASME B31.8 Chapter VIII section A811, is there any reason why plastic pipe with non metallic reinforcement such as RTP pipe is prohibited to be used for offshore liquid pipeline system under ASME B31.4 or for gas transmission line under ASME B31.8?
  3. ek4putr4

    Self thrusted pig for cleaning blockage pipeline

    Dear All, Anybody know any technology/vendor that have self thrusted pig for cleaning blockage pipeline? Rgds Ekaputra
  4. ek4putr4

    Cathodic protection separation for Offshore to Onshore Pipeline

    Dear All, I have one pipeline under design stage, comprise of 10 km offshore and 400 m onshore. Most of the onshore section is above ground on support, except at the road crossing where it is buried. Initially it was proposed to install insulating gasket kit at shore landfall to separate the...
  5. ek4putr4

    What the is difference between MAWP and Design Pressure

    Can anybody explain what is the difference between Maximum Allowable Working Pressure (MAWP) and Design Pressure for pipeline system? Can it be the same?
  6. ek4putr4

    Bracelet Anode Length

    Hi, Is there any limitation or minimum length of Half bracelet Anode? FYI, we have one calculation that shows 180 mm of the anode length. The thickness of the anode (Aluminium Alloy) is 55 mm for 24" pipeline OD + 5.5 mm AE coating.
  7. ek4putr4

    Offshore pipeline installation start-up

    Dear all, What is the pros and cons of using single cable mooring attached to one of the platform jacket leg for start-up of offshore pipeline laying?
  8. ek4putr4

    Pipeline welding

    We received aorund 5000 jts of linepipe 24" OD 14.3 mm Wt API 5L X65 SAW @12 m/jts. The problem is that the weld seam at the end of of the linepipe is not grinded flush to the OD of the pipe. Will this cause problems during welding offshore? Do we need to grind it flush, maybe 50 mm around both...
  9. ek4putr4

    Zap-Lok Pipeline Connection System

    Dear All, Does anyone have experience using Zap-Lok connection system or any equivalent connection system for Offshore Pipeline installation? Supplier of this connection claim that it reduce the installation cost by 45-60 % compared to welded type. Rgds, Ekaputra
  10. ek4putr4

    Linepipe Chemical Properties Deviation

    Dear All, We have a linepipe specification (API 5L X-65 PSL2 LSAW)that requiring max chemical composition %wt as follow: C:0.16, Mn:1.3, Si:0.45, P:0.015, S:0.003, V:0.08, Nb:0.05, Ti:0.04, Cr:0.2, Mo:0.1, Ni:0.35, Cu:0.4, Al:0.05, N:0.012, B:0.0005, Ca:0.006, CE:0.39, PCM:0.21 Unfortunately...
  11. ek4putr4

    Line Pipe Pre-Production Inspection

    Dear All, If I'm a purchaser, what item usually required to be inspected at the mill during pre-production inspection for LSAW pipe (API 5L X65 PSL2)? Regards, ekaputra
  12. ek4putr4

    Offshore Pipeline Leak : Preservation Method

    Dear Pipeliners, What is the best method to preserve a leaked offshore pipeline? The leakage is at the dogleg bend's weld (parted), therefore cannot be clamped. The pipeline is currently shut down, and already exposed to sea water for about 4 month. Next 5 month will be expected to carry out...

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