Short answer. 3PE is a three-layer external coating: fusion-bonded epoxy primer, adhesive and a polyethylene outer layer. It protects the pipe against soil corrosion and handling damage. It does not replace the internal lining.
- It is an external system only. For municipal water, cement mortar lining or an approved epoxy lining is specified separately for the bore.
- Coating class, layer build-up and the field joint coating material follow the owner’s specification and the applicable coating standard.
- Girth welds are coated in the field, so the joint coating method and who is responsible for it must be written into the technical agreement.
- Transport matters as much as the coating: pipe-end protectors, timber dunnage and padded slings protect the layer through multiple handlings.
Common references are AWWA C215 and, where the owner adopts them, DIN 30670 or ISO 21809, with ISO 21809-3 for field joint coatings.
On island deliveries the coating is handled several times between mill, port, barge and site, so the outer layer and the joint coating material should be selected together rather than sequentially.
See our 3PE coated SSAW steel pipe for the supply range. Tell us your soil, groundwater and transport route and we will send an external-coating comparison for your project. Send your enquiry.Short answer. 3PE is a three-layer external coating: fusion-bonded epoxy primer, adhesive and a polyethylene outer layer. It protects the pipe against soil corrosion and handling damage. It does not replace the internal lining.
- It is an external system only. For municipal water, cement mortar lining or an approved epoxy lining is specified separately for the bore.
- Coating class, layer build-up and the field joint coating material follow the owner’s specification and the applicable coating standard.
- Girth welds are coated in the field, so the joint coating method and who is responsible for it must be written into the technical agreement.
- Transport matters as much as the coating: pipe-end protectors, timber dunnage and padded slings protect the layer through multiple handlings.
Common references are AWWA C215 and, where the owner adopts them, DIN 30670 or ISO 21809, with ISO 21809-3 for field joint coatings.
On island deliveries the coating is handled several times between mill, port, barge and site, so the outer layer and the joint coating material should be selected together rather than sequentially.
See our 3PE coated SSAW steel pipe for the supply range. Tell us your soil, groundwater and transport route and we will send an external-coating comparison for your project. Send your enquiry.
