Field Joint of Cement lined Pipe
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This document provides instructions for field joining of cement lined pipes for fire water lines. It describes the stages of the process which include mixing the coating material, surface preparation of the steel, applying the material, fitting up the joint, and welding. The coating material used is called SINMAST, which is a two-component epoxy resin. The document provides details on mixing and applying the coating material, preparing the steel surfaces, fitting up the joint, allowing time for the material to harden before welding, and testing the completed joint.
Field Joint of Cement lined Pipe
- 2. Stages Mixingofcoatingmaterial Surfacepreparation Application Jointfitup Welding Testing PreparedByV.JohnsonPrabu
- 3. CoatingMaterial SINMAST SINMASTjoiningcompoundisusedfor bondingcementlinedpipingcomponents. Sinmast isa2component,solventfree productbasedonEpoxyResins ComponentA Resin(0.945kg) ComponentB Hardener(Ethylamine, Isopropylideendifenol)(0.055kg) PreparedByV.JohnsonPrabu
- 5. CoatingMaterial Mixing BothcomponentA&Bmixedtogether Toavoidwastageitcanbedividedinto10 partsanduseitasrequired. Thepotlifeofmixedcomponentis25min@ 20oCapprox.(WorkingTime) Thehardeningtimeis8hrs@20oCapprox. PreparedByV.Johnson Prabu
- 6. CoatingMaterial Mixing ComponentA Totalweight =945gm 1/10part =94.5gm PreparedByV.JohnsonPrabu
- 10. Application Applythemixedcoatingmaterialgentily on thesleevesideatanangleof45oapprox. Removetheexcessmaterial. Thejointhematingsurfaceandapplyslight pressure.(usuallyafterjoiningyoucanfind 3mmdifference) PreparedByV.JohnsonPrabu
- 14. Welding Donotmovethejointafterfitup. Supportthelineadequatelytorestrictthe movement. After12hrs (ie;hardeningtimeofcoating material)thejointisreadyforwelding. PreparedByV.JohnsonPrabu