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  • Users: Merc-
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  1. Merc-

    Paint repair

    Hi all, Observation: Paint flaking/getting peeled off easily( white metal is visible now) Equipment: Piping(HDG)+ epoxy mastic coating( 3 coats) We want to repair these peeled off areas. Is there any standards which describes how much area to be removed(Surface preparation) for the repair...
  2. Merc-

    What are certifications required to

    What are certifications required to become a QA/QC mechanical inspector(Static & rotating equipment + piping)?
  3. Merc-

    Pressure test for open end piping network

    Hi everyone, Is pressure test required for piping system which is open to atmosphere? Sea water Intake and outfall pipelines(Around 1km in total length,HDPE-DN1000) which is submerged in a offshore trench and each spool(previously hydrotested ) is connected by bolted flanges. One end of...
  4. Merc-

    SS Steel Corrosion

    Hi all, Is there any solution for corrosion in SDS pipes and SDS pump casings other than pickling and passivation?
  5. Merc-

    GI Bolts corrosion

    Hi All, We have found that Galvanized Stud bolts are heavily corroded. What is the corrective action to rectify the corrosion problem here? Corroded material: Stud bolts Occurrence: Interconnecting piping, Pump suction-discharge connections Atmosphere: Near Sea open atm Its been observed that...
  6. Merc-

    HDPE leak test

    Hi all, What is maximum limit of pressure drop during leak test? We are performing leak test for HDPE chlorine line(DN 75, offshore line) to check the integrity of flanged connections. Individual spools are hydrotested(at 6 Bar) for welded connections at shop. Leak test will be carried out at...
  7. Merc-

    Pump installation

    Hi All! What is the minimum clearance required between the foundation anchor bolts and foundation edge of a pump? Des: The foundation Anchoring is by Anchor Pockets and these are formed during the initial foundation casting. Installation of pumps were as per the co-ordinates to align the...
  8. Merc-

    Torque values

    Hi all, I am using a Hex bolt(M12x40, 8.8u grade, Hot dip Galvanized) for a structural joint. How can I get torque value for this bolt?

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