3LPP – Three layer polypropylene

EXTERNAL COATING AND INTERNAL LINING

Three layer polypropylene - render

V.I.P. Pesaro is one of the few companies able to offer the 3LPP coating on pipes as well as on custom pieces.
The coating is a multilayer composed of a primer fusion bonded epoxy (FBE) followed by an adhesive copolymer and another layer of polypropylene which provides resistance and long-lasting protection.
The system ensures the applicability of the sintered coating also on pieces with special shapes.

Long-term anticorrosive protection
The FBE primer offers an excellent adhesion to the substrate and provides a long-term corrosion protection for pipelines operating at moderate temperatures. It also ensures resistance to cathodic disbondment so the total cost of cathodic protection of the pipeline decreases.

Very good mechanical protection
The layer of applied polypropylene protects the pipeline during transport and installation, thus reducing repair costs and guarantees underground protection against mechanical, chemical and abrasive attacks.
The thicker the applied polyethylene the higher the obtained mechanical protection.

Other advantages of the sintered system
V.I.P. using this special application technique is able to coat also specific pieces with special shapes. (bends, tees, reducers, joints, etc.).
There aren’t any limitations about the amount of pieces to coat, even the single piece can be treated.
3LPP can be applied in different thicknesses to meet the requirements of the project specifications.

3LPP triple layer polypropylene

3LPP PROCESS

EXTERNAL COATING

INTERNAL LINING

INSPECTION AND TESTING

Property Test Description Typical Values
Degree of cure of epoxy resin ISO 21809/1 ∆Tg according to the manufacturer specifications
Impact ISO 21809/1 > 10 J/mm
Cathodic Disbondment ISO 21809/1 23°C/ 28 days or 60°C/ 2 days max 7 mm
Peel Strenght ISO 21809/1 ≥ 25 N/cm at 23°C; ≥ 4 N/cm at 90°C
Continuity (holiday detection) ISO 21809/1 10 kV/mm; max 25kV

COATING CAPACITY

Pipes:
Diameter from 1/2” to 120”
Maximum unit length 13.5 meters
Maximum unit weight 15,000 kg.
Joints and/or custom pieces: (bends, tees, reducers, flanges, etc.)
Maximum size 3.0 x 3.0 x 13.5 meters
Maximum unit weight 15,000 kg
Maximum thickness of the coating 3,5 mm

DOCUMENTATION

3LPP – Samples

PROCESS - 3LPP 3-LAYER-POLYPROPYLENE

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