3PE Anti-corrosion Steel Pipe Epoxy Coating Reinforce Grade Gas

3PE anti-corrosion pipe is a kind of pipe product that strengthens the protection of steel pipe through three-layer composite coating technology. Its anti-corrosion layer is composed of FBE bottom layer, adhesive middle layer and high density polyethylene (HDPE) outer layer, forming a collaborative protection system with both chemical stability and physical resistance.

Product Description
Product Name	3PE Anti-corrosion Steel Pipe Epoxy Coating Reinforce Grade Gas Pipeline
Standard	DIN30670,NF A49-710,CAN/CSAZ245.21,ISO DIS21809-1,GB/T23257,SY/T0413
Size	Outer Diameter	32-1620mm
	Wall Thickness	2.9-60mm or customized
	Length	5-12m or customized
Surface Treatment	External:3PE
	Internal:Liquid Epoxy
Layer Tolerance	±10%
Features	Strong bonding strength,good insulation performance,mechanical shock resistance,long service life,and small cathodic protection current density,etc.
Application	Suitable for the underground water supply and drainage in coal mines down hole shotcrete, ventilation of positive and negative pressure,waste residue of process water,backwater and long-distance underground pipelines for oil,water,and gas,etc.
Min.Order	25 tons,more quantity price will be lower
End	Plain,beveled,cutting,threading.flange or customized
End Protector	Plastic pipe caps,iron protector or customized
Package	1.Bundling with steel strip. 2.Oiled and packing with plastic wrap 3.In bulk. 4.Packing in woven bags. 5.As customer’s requirement
Shipping	1.Length 2.Length>/=6.0 Meters,Loaded in 40 Feet Container
Delivery Time	Normally within 15 days and according to the quantity.

Manufacture Technique

Pretreatment of the steel pipe surface

The oxide skin, oil pollution and impurities on the surface of the steel pipe are removed by shot blasting and rust removal process to achieve the cleanliness of Sa 2.5 level (ISO 8501-1 standard), and the surface roughness of 50-90 μ m is formed to enhance the adhesion of the coating. Then use compressed air to dust to ensure that the substrate is clean and dry.

Coating

lPreheat with the FBE bottom coating

The steel tube is heated to 180-220℃ by intermediate frequency induction, and the molten epoxy powder (FBE) is evenly covered on the surface by electrostatic spraying technology. At high temperature, FBE melts and solidifies to form a dense bottom layer of 80-150 μ m, which has excellent cathode peel resistance and chemical corrosion resistance, and strong adhesion of acid and alkali resistance.

lCoating of adhesive in middle layer

When the FBE layer is still in a molten state, coat the vinyl-acrylic acid copolymer (EAA) or vinyl-vinyl acetate copolymer (EVA) adhesive with a thickness of approximately 170-250 μ m. The adhesive is chemically bonded with the FBE and the subsequent HDPE layer at high temperature to effectively prevent the interlayer peeling.

lHDPE outer layer molding

After heating and melting the high density polyethylene (HDPE) particles, the extruder spiral is wound around the adhesive layer and coated by extrusion winding process to form a 1.8-3.7mm thick outer protective layer. The HDPE layer is quickly finalized by water cooling, and has strong mechanical impact resistance, ultraviolet resistance and waterproof permeability, and adapts to the complex geological and climate environment.

Cooling setting

Through the rapid cooling of the water cooling system, the HDPE layer is crystalline and solidified, forming a protective shell with mechanical damage resistance and strong weather resistance.

Quality inspection and repair

Electric spark detection: use 15-30kV high voltage detector to scan the coating and check the pinhole, crack and other defects.

Thickness test: Magnetic thickness tester verifies that the thickness of each layer meets the ISO 21809 or DIN 30670 standards.

Adhesion test: peel test is used to ensure that the bonding strength of the adhesive layer is greater than or equal to 70N/cm.

When defects are found, they should be partially polished and remelted to ensure the integrity of the protective layer.

Packaging & Delivery

· Packaging Details: Bundles wrapped with strong steel trips, caps on two ends of every pipe or according to customers’ requirements.
· Port: Tianjin Port
· Lead Time: Within 20-30 days depends on the order quantity

Packaging & Shipping

· Minimum order quantity: 5 tons
· Price: FOB or CIF or CFR at Xin’gang port in Tianjin
· Payment: 30% deposit in advance, the balance against the copy of B/L; or 100% L/C, etc
· Lead Time: within 10-25 workdays normally
· Packing: Standard seaworthy packing or as per your request .(as pictures)
· Sample: Free sample is available.