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Shanghai Luojing Port Container Terminal — DN2620 Coated Spiral Pipe for Rainwater
Project at a glance
Location
Luojing port area, Shanghai, China — container terminal reconstruction
Application
Rainwater transmission system
Product
Spiral-welded steel pipe, L245, epoxy-resin coated inside and outside
Size
DN2620, custom cut lengths from 1 m to 8 m
Ends
DN2620 flat-welding flange welded at both ends
Volume
Several hundred tonnes, delivered in two batches
Status
Construction completed and the system is in service (2025)
Why the lengths vary
A terminal retrofit is not open-country pipeline work. The route threads between piled foundations, crane rails and existing services, so the pipe was cut to lengths from 1 m to 8 m to match the actual measured runs on site, with a DN2620 flat-welding flange at both ends so that each piece bolts or welds directly into the next without a separate spool.
DN2620 pipe with welded flat-welding flanges, loaded for deliveryCoated pipe installed in the trench inside the terminal
Coating for a marine environment
Internal and external epoxy-resin coating on an L245 body — internally to protect the bore in a rainwater system that carries silt during storms, externally against the salt-laden air and soil of a port area. The flange faces were masked during coating so that the joint faces stayed clean for welding, and dry-film thickness was checked with a gauge per length.
Dry-film thickness check on the external epoxy coat
What a retrofit demands from a supplier
Short, varied lengths — cutting to measured lengths on a large diameter is slow work; doing it in the shop saves site time and scrap.
Two batches — supply split to follow the contractor’s access sequence, not our convenience.
Flange-to-flange accuracy — overall length and flange squareness held per piece, otherwise the run will not close.
