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Field Joint of Cement lined Pipe
Fire Water Line
Field Joint of Cement lined Pipe
Fire Water LinePrepared By V.Johnson Prabu
Stages
• Mixing of coating material• Surface preparation• Application• Joint fit‐up• Welding• Testing
Prepared By V.Johnson Prabu
Coating MaterialSINMAST
• SINMAST joining compound is used for bonding cement lined piping components.
• Sinmast is a 2 component , solvent free product based on Epoxy Resins
• Component A – Resin (0.945kg)• Component B – Hardener (Ethylamine , Isopropylideendifenol) (0.055kg )
Prepared By V.Johnson Prabu
Coating material
• Component A
• Component B
Prepared By V.Johnson Prabu
Coating MaterialMixing
• Both component A & B mixed together• To avoid wastage it can be divided into 10 parts and use it as required.
• The pot life of mixed component is 25min @ 20o C approx. ( Working Time )
• The hardening time is 8hrs @ 20o C approx.
Prepared By V.Johnson Prabu
Coating MaterialMixing
• Component A Total weight = 945 gm1/10 part = 94.5 gm
Prepared By V.Johnson Prabu
Coating MaterialMixing
• Usually One full cap of the can is equal to 1/10 part. ( Measure it before mixing and conform)
Prepared By V.Johnson Prabu
Coating MaterialMixing
Prepared By V.Johnson Prabu
Surface Preparation
• The mating steel surface shall be free from oil, rust, burs and other foreign material.
Prepared By V.Johnson Prabu
Application
• Apply the mixed coating material gentily on the sleeve side at an angle of 45o approx.
• Remove the excess material.• The join the mating surface and apply slight pressure. ( usually after joining you can find 3mm difference )
Prepared By V.Johnson Prabu
Application
Prepared By V.Johnson Prabu
Joint Fit‐up
Prepared By V.Johnson Prabu
Joint Fit‐up
• Only tack weld the joint at three locations• Remember : Joint shall be weld after 12 hrs
Prepared By V.Johnson Prabu
Welding
• Do not move the joint after fit up.• Support the line adequately to restrict the movement.
• After 12 hrs (ie; hardening time of coating material ) the joint is ready for welding.
Prepared By V.Johnson Prabu
Welding
• Now the joint is ready for Further Testing
Prepared By V.Johnson Prabu
Thank you !
Prepared By V.Johnson Prabu