basic 2 min read
Pipeline Crossing
Onshore Pipelines 1. The use of casings for the crossing of roads or railways should be discouraged because of the difficulty…
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Pipeline Micro-Tunnelling
1. Micro Tunnelling process uses a Micro Tunnel Boring Machine (MTBM) combined with pipe jacking technique. 2. Pipe jacking from launch shaft…
basic 4 min read
Pipeline Trenching
Onshore Pipelines 1. Onshore pipelines should be buried to protect them from mechanical damage, fires and tempering. 2. The recommended minimum covers…
basic 1 min read
Pipeline ROU Clearing and Grading
1. All obstacles causing hindrance in construction / laying pipeline are removed. 2. Entire ROU is graded for movement of equipments and…
basic 1 min read
Pipeline Field Joint Coating
1. The cut-back areas of Coated Pipes where weld joints are made are to be Coated by Field Joint Coating. 2. Field…
basic 1 min read
Pipeline Holiday Detection
Holiday detection means testing the coating of pipeline with 15 KV or 25 KV Voltage for any pores in coating.
basic 1 min read
Comparison of Pipeline Coatings
Factor CTE 3LPE 3LPP FBE Service Conditions Temperature Upto 45C Upto 65C Upto 110C Upto 110C Anti Corrosion Properties Resistance…
basic 1 min read
CTE Coating
● It’s a Coal Tar Enamel (CTE) Coating. ● 1st Coat : Coal Tar Primer – 50 to 75 Microns. ● 2nd Coat : 1st hot…
basic 1 min read
3LPE Coating
1. It’s a 3 Layer Polyethelene Coating / FBE Coating. 2. 1st Layer : Fusion Bonded Epoxy – 50 Microns (200 to 300…
basic 1 min read
Coat Testing
1. Check for holiday at 25 KV for 3LPE Coating and 15KV for CTE Coating. 2. Mark pipes for teting e.g. peel…
basic 1 min read
Coating Process
1. Bare pipe visual inspection : Pipe no., Heat No. Length, Dia, Thickness, bevel and body damages like dents, gauges etc.…