3PE Pipe
GNEE Group was founded in 2008. GNEE Group has 18 years of experience in steel pipe production and sales. It has many factories such as foundries, rolling mills and extrusion plants. It is equipped with continuous pipe rolling units, Assel pipe rolling units, Accu-Roll pipe rolling units, large diameter seamless pipes, etc. Production equipment such as steel pipe units and rotary expansion units. All steel pipes and accessories are produced and tested in strict accordance with national standards such as ASTM, API, JIS, DIN, EN, GB, and ASME. At the same time, GNEE Group can also provide multi-standard and multi-specification steel pipes according to corresponding international standards and customer requirements. The company's more than 200 employees are available online 24 hours a day to provide high-quality steel pipes to customers around the world. We have obtained certifications from CE, SGS, ISO, BV and other institutions to ensure the quality of steel pipes for you throughout the process.
Professional team
More than 200 experienced employees are at your service online to develop high-quality and low-priced product plans and logistics plans for you.
7x24 hours delivery
Warehouse has 5000 tonnes steel stock, complete specifications, support Shanghai, Ningbo, Tianjin and other ports of delivery, 7x24 hours delivery capacity, is your best partner!
35000+㎡
Factory
18+years
Experience
200+
Employees
8000+
Global Partners
GNEE Service
Pre-sales consultation
Professional engineers can provide sprocket expertise consultation and professional advice on product selection, design, installation, and maintenance.
Cost saving
One-stop service helps you choose products suitable for your market and budget, save time, and achieve win-win cooperation.
Stable delivery
We will arrange production and shipment according to the customer's schedule and order urgency, and deliver on time. The fast shipping system allows customers to receive products quickly.
Authoritative inspection
Professional quality inspectors will conduct a quality inspection on each batch of products. Authoritative test reports are also available.
Steel Pipe Processing Services
Practice the concept of 'common development and common profit'.
What is 3PE Pipe?
3PE anticorrosion steel pipe is a very common anticorrosion pipeline, its anticorrosion performance is very superior.3PE anticorrosion steel pipe parent material includes seamless steel pipe, spiral steel pipe and straight seam steel pipe, and the other three layers of anticorrosion materials are epoxy powder, adhesive and polyethylene.
Three-layer structure of polyethylene (3PE) anti-corrosion coating with its good corrosion resistance, water permeability and mechanical properties, etc., in the petroleum pipeline industry has been widely used.
3PE pipe has excellent anti-corrosion performance and its own anti-corrosion layer has an inseparable relationship. Generally the same material of the pipe buried in the ground after a few years may rot, while the anti-corrosion steel pipe can ensure that decades do not rot, the key is the anti-corrosion layer.
Polythene anticorrosion layer is divided into two-layer structure and three-layer structure two kinds. The bottom layer of two-layer structure is adhesive layer, and the outer layer is polyethylene layer; the bottom layer of three-layer structure is usually epoxy powder coating, the middle layer is adhesive layer, and the outer layer is polyethylene layer. GNEE reminds you that it is not suitable to use two-layer structure of polyethylene anticorrosive layer for the pipeline above DN500.
Thickness of the anti-corrosion layer
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
||
3PE Steel Pipe Advantages:
-
2PE and 3PE anti-corrosion pipe is light in weight and strong in bonding;
-
Coating coating uniformity, high toughness;
-
Strong anti-stress fission, high impact resistance;
-
High sealing and insulation performance;
-
Strong anti-chemical corrosion and waterproof performance, aging resistance;
-
Good environmental protection, convenient local maintenance;
-
Strong stability; service life of up to 50 years or more.
3PE Anti-corrosion Process of Pipe
(1) Before processing, the appearance of steel pipe should be visually observed by skilled workers, root by root, the steel pipe with or without serious mechanical damage, heavy skin, cracks, depressions and other defects, inspection of unqualified steel pipe can not be used, and make a failure to mark the return. Acceptance can only be used for construction.
(2) spiral steel pipe if the mouth of the flat mouth, should be timely rounding repair, can not be repaired should be scrapped.
(1) Firstly, the steel pipe to be anticorrosive is transported to the upper pipe platform of the operation line by the pipe grabber, and the flame heater device is used to preheat the outer surface of the steel pipe to drive away the moisture, oil and impurities on the surface of the steel pipe, and the heating temperature is controlled to be 40℃~60℃ to improve the quality of descaling of the surface of the steel pipe.
(2) steel pipes are descaled by steel pipe shot blasting machine, in the steel pipe into the shot blasting room, with a rubber pad or a thick sponge made of pipe plug plug at both ends of the steel pipe mouth (such as the steel pipe comes with a pipe plug to use its own pipe plug blocking), to avoid the steel pipe in the process of descaling, shot blasting chamber of the steel shot flying into the mouth of the pipe to reduce the loss of steel pills, and at the same time to ensure that the pipe in the removal of the amount of steel pills, the descaled steel pipe after shot blasting The surface of the steel pipe should reach Sa2.5 level as stipulated in GB/T8923-1988 of ‘Rust Level and Descaling Level of Steel Surface before Painting’, and the depth of the anchor grain on the surface should be carried out according to the instructions provided by the epoxy powder manufacturer.
(3) After the surface pretreatment, all the rust, oil, oxide skin, etc. should be removed.
(4) Examine the outer surface of the steel pipe root by root, and polish the surface defects that may lead to coating leakage points using suitable methods, and the wall thickness after polishing should not be less than the specified value. The steel pipe with defects shall be rejected or repaired.
(5) The steel pipe with unqualified descaling quality shall be taken off the line in time to remove the throws in the pipe, and then return to the production line for descaling again.
(1) After the steel pipe is descaled by shot blasting, before the next process of high-pressure electrostatic spraying of epoxy powder, the dust treatment device is used to carry out the secondary treatment on the external surface of the steel pipe to remove the residual rust powder and dust on the external surface of the steel pipe, and the epoxy powder coating should be carried out within 4 hours, and if more than 4 hours or the surface of the steel pipe appears to be rusty, the surface pre-treatment must be carried out again. When the surface of steel pipe is treated with fine dust, the induced draft fan on the dust removal device should be started first, and then the dust removal motor should be started; if the production needs to be interrupted, the stop button of the dust removal motor should be pressed first, and then the induced draft fan work should be stopped.
(2) Clean the dust in the cyclone hoover regularly to avoid excessive accumulation and affect the dust removal effect.
(3) The working condition of the induced draft fan should be checked frequently after starting the fine dust device.
(4) The dust removal electrode should be maintained on schedule to ensure normal operation.
(5) When carrying out anti-corrosion production, the surface of the steel pipe should be checked at least once an hour for microdust treatment.
(1) The steel pipe after microdust treatment should be preheated before epoxy powder coating, using KGPS-750uw constant power medium-frequency machine to heat the steel pipe, and the preheating temperature must be in accordance with the temperature required for epoxy powder coating, but the maximum shall not exceed 275℃.
(2) Check the water level of the medium frequency circulating pool, make sure the water volume is at least ~3 cubic metres. Start the medium-frequency circulating water pump, check whether all the circulating water pipes are leaking or not, and start the medium-frequency device machine only when you are sure that all the circulating water pipes are normal.
(3) According to the feeding speed of steel pipes of different diameters and the predetermined heating temperature, use the experimental pipe to adjust and determine the output power value of medium-frequency heating during production on the operating line.
(4) The use of advanced temperature measuring instruments to measure the temperature of the steel pipe preheating, improve the accuracy of the measurement to ensure that the steel pipe for powder coating, the steel pipe preheating temperature in the range recommended by the powder coating manufacturer.
(5) When carrying out anti-corrosion production, measure and record at least once every hour to determine the preheating temperature of steel pipe when powder coating.
- Epoxy Powder Roll Coating Or Spraying
- Plastic Coated Steel Pipe Processing
- Adhesive-coated And Polyethylene Tape Wrapping
(1) The coating of the adhesive shall be carried out during the gelling process of the epoxy powder.
(2) When the lateral winding process is used, it shall be ensured that the polyethylene in the lap section and the polyethylene on both sides of the weld seam are completely rolled and compacted, and the surface of the polyethylene layer shall be prevented from being crushed.
- Circulating Water Cooling
After the end of the steel pipe anti-corrosion layer production, should be promptly cooled and fixed moulding, can be used to circulate water pouring coating room on the corrosion of the finished steel pipe for the anti-corrosion layer surface layer of the cooling, cooling to take a section by section sub-methods.
(1) Before production, start the circulating water pump motor in the coating room.
(2) Adjust the switch of each valve of cooling water pipe to control the size of cooling water to avoid the impact on the anticorrosion coating caused by the excessive speed of water flow, which will affect the appearance and forming quality of the coating.
(3) Before the steel pipe enters the first set of drive wheels in the pouring and coating room, it is cooled by the first cooling water. So that the steel pipe surface layer just anticorrosion on the coating in rolling to the first set of rubber wheels, the anticorrosion layer will not be damaged and remain intact.
(4) According to the size of the pipe diameter and the difference in ambient temperature, take 2~4 sections of cooling water for cooling by section by section, the cooling temperature of the steel pipe is not higher than 60 ℃, and to ensure that the fusion bonded epoxy coating is fully cured.
(5) The appearance of the coating shall be flat, even in colour, free of bubbles, cracks and shrinkage holes, mild orange peel pattern is allowed, and the thickness of the coating shall meet the design requirements.
(6) At least the thickness of the anti-corrosion layer of the 1st, 5th and 10th steel pipes shall be checked for each consecutive production batch, and at least one for each 10th pipe shall be sampled thereafter.
(7) If the owner has requirements, it shall be implemented according to the owner's requirements.
- Cutting And Leaving Head
After the anti-corrosion layer of the steel pipe is cooled by cooling water, the length of the pipe end retaining head shall be 100-120mm as required by the regulations.
- Grinding Pipe End Retained Head
(1) The end surface of polyethylene layer should form a chamfer of not more than 30 degrees, and the epoxy powder coating of not more than 20mm can be retained outside the end of polyethylene layer. It should be prevented from peeling or warping of the anticorrosion layer at the end of the anticorrosion pipe.
(2) Pipe end retaining head using electric wire brush for pipe end retaining head treatment, operation according to 2~3 times in sections to achieve the standard requirements.
(3) The wire brush used for grinding the chamfer of the anticorrosion layer at the end of the pipe, the working surface should be flat, no bumps and dents.
GNEE Pipe Quality Control
① Quality inspection is carried out by sampling according to the design regulations.
② Use visual inspection root by root. The surface of the cover layer should be uniform, wrinkled, flat, without bubbles, convex tumours and uneven crimping and other cover layer defects.
③ Check pinholes with a pinhole checker. If pinholes are found, use a sandpaper sander to sand and fill the paint.
④ Insufficient thickness of paint film or pinhole, should be rechecked after returning to repair and curing. The unqualified ones should be repaired again until qualified.
⑤ Adhesion check, use a hard tool to make a cut with an angle of 60 on the coating for random check. Should be cut through the coating directly to the substrate, with tape to paste the scratched portion, tear off the tape afterwards to observe the scratches, the coating should be no flaking, but also in the same conditions on the spray paint samples for inspection.
Steel Pipe Coating Inspection and Acceptance
① During and after surface coating construction, the coated workpiece should be protected to prevent flying dust and other debris.
② After the coating of the treatment check, should be the same colour of the coating. The colour is bright and shiny, no wrinkles, blistering, hanging, leakage and other defects.
③ Determination of coating film thickness. Determination of paint film thickness with contact paint film thickness gauge, paint film thickness gauge generally determine the thickness of 3 points, take the average value.
GNEE Supply 3PE Pipe Specification:
Size:Outer Diamter: 219.1mm - 4064mm (8" - 160")
Wall Thickness: 3.2 mm - 40mm
Length: 6mtr-18mtr
End:square ends (straight cut, saw cut, and torch cut).
beveled for welding, beveled
Surface:Lightly oiled,
Hot dip galvanized,
Electro galvanized,
Black,
Bare,
Varnish coating
Anti rust oil, Protective Coatings
Packaging and Shipping
GNEE Group ensures that steel pipes are delivered to customers safely and on time
01
Pipe Package
Plastic plugs at both ends,
Hexagonal bale with maximum weight of 2,000kg 2,000kg hexagonal bale with multiple steel strips,
There are two labels on each bundle,
Wrap with waterproof paper,
plastic cap.
02
Pipe Shipping
GNEE provides the most efficient and safest domestic and overseas transportation for all products: sea, air, container rail, ship, rail and truck transportation.
Rail transport by sea, air, container, ship, rail and truck.
GNEE Pipe Service
Pipe Cutting
Application: Carbon ,stainless& Alloy steels
Cutting Range: 6mm – 170mm thick (thicker material available on request)
Cutting Area: from 50mm
Cut and Roll Grooving for Steel Pipes
Grooving and roll grooving can be performed in any style according to industry standards. It is suitable for any length of steel pipe from 1"-48" in diameter.
Pipe Threading
We can provide threads for any length of pipe ranging from 1/8" to 20" in diameter. Tapers available are NPT*, NPS*, 3/16" Peerless, and 8-cone.
Pipe Beveling
The main forms of groove processing provided by GNEE are V-shaped groove, Y-shaped groove, U-shaped groove, double V-shaped groove and X-shaped groove.
Pipe Coating
GNEE Group supply: 3PE costing, Epoxy Coating, 3PP Coating, FBE Coating, Anti-rust Black Painting, Anti-rust Oil Painting, Bituminous Painting, Expoxy Painting, etc..
FAQ
Q: Are you a steel pipe manufacturer or trading company?
Q: Can I visit your factory?
Q: Has your company received any certifications?
Q: Can you provide free samples?
Q: How long does it take for delivery?
Q: Can I customize some other sizes of products?
We provide OEM/ODM.
Q: How do we get quotation?
Q: What is your payment term?
Q: What are your terms of trade?
Q: What is your MOQ?