1.) Trikote® 3-layer HDPE (Trilaminate)

Trikote® is a multilayer, thermoplastic coating designed to provide maximum long term corrosion resistance and mechanical protection to steel pipe. The system was developed for use in demanding pipeline environments where superior adhesion, cathodic disbondment and impact resistance properties are essential to maintaining pipeline integrity.

It consists of the 3 following components which are simultaneously applied to the pre-heated pipe to form a homogenous barrier against corrosion. The system is typically available in yellow or black:-

i) A primary layer of thermosetting fusion bonded epoxy (FBE) powder that adheres to the heated steel substrate providing the corrosion protection and

ii) A secondary layer of adhesive polymer resin that reacts chemically with the previously applied FBE to act as a bonding agent and

iii) A third layer of high density polyethylene (HDPE) that bonds with the previously applied adhesive resin providing mechanical protection to the system

Available in pipe sizes from NB80 to NB1,500. The system is also available with a polypropylene topcoat layer (3-layer PP) in lieu of polyethylene. This allows service temperatures up to 120°C for severe applications.

Trikote® system performance tests to Canadian CAN/CSA-Z245.21-2002

† Coating qualification/compliance tests only

Coating thickness guidelines:-

The degree of abrasion and impact resistance can be greatly enhanced by increasing the thickness of the HDPE topcoat material making the coating suitable for extremely demanding applications.

2.) Yellowkote 2-layer HDPE

Yellowkote is a dual layer, thermoplastic coating designed to provide medium term corrosion protection to steel pipe. The system was developed in North America in the 1960’s to replace asphalt/coal tar coatings and consists of the 2 following components:-

Available in pipe sizes from NB60 to NB600

Yellowkote system performance tests to AS1518-2002

† Coating qualification/compliance tests only

Coating thickness guidelines:-

Additional thickness for mechanical protection may be achieved by double coating.

3.) Fusion Bonded Epoxy (FBE)

Fusion bonded epoxy is a powder coating designed to provide long term corrosion protection to steel pipe. The system was developed for the protection of pipelines operating at elevated temperatures where coating adhesion and resistance to soil stresses and cathodic disbondment are required. It consists of:-

Available in pipe sizes from NB80 to NB1,500

FBE & Dual layer FBE (2FBE) system performance tests to AS3862-2002 (Table B3)

† Coating qualification/compliance tests only

Coating thickness guidelines:-

In accordance with AS3862, a minimum coating thickness of 400µm is recommended. However, coating thickness will be greatly influenced by pipeline operating temperature, intended service application and many other factors. Coating flexibility is reduced at thicknesses >600µm.

4.) Dual layer Fusion Bonded Epoxy (2FBE)

Dual layer fusion bonded epoxy is a 2-component powder coating designed to provide long term corrosion resistance and mechanical protection to steel pipe. The system was principally developed for road/river crossing and HDD applications where resistance to abrasion and gouging are considered important. It consists of:- 

As with the Trikote® and single layer FBE system, pipe pre-heat is achieved through the use of high frequency electrical induction heating.

Available in pipe sizes from NB80 to NB1,500

2FBE system performance tests to AS3862-2002

Coating thickness guidelines:-

Coating thickness will be greatly influenced by intended service application and many other factors. Coating flexibility is greatly reduced at thicknesses >600µm.

5.) Innerkote internal linings

Two component liquid epoxy coatings are generally thin film systems designed to provide corrosion protection and chemical resistance to the internal pipeline surface in the period preceding pipeline commissioning. Principally developed to enhance gas flow efficiency (potentially reducing pipeline compression requirements) and to maintain pipe bore cleanliness. The cured coating also tolerates hydrostatic testing, helps to reduce pipeline pigging and drying cycle times and minimizes fouling and damage to valves thereby saving on costs. It consists of:-

i) A two pack liquid epoxy paint spray applied to pre-blasted steel to form a tightly adherent and glossy finish

Available in pipe sizes from NB100 to NB750. The coating can be applied before or after external coating operations depending on specific project logistics.

Innerkote system performance tests to API RP5L2-2002

Coating thickness guidelines:-

Coating thickness will be greatly influenced by intended service application and many other factors. High build epoxy systems for transmission of aviation fuel and other mediums are also available.