Faygo, a Wanplas factory, is a specialized manufacturer of plastic pipe and profile extrusion lines with 22 years of dedicated experience in this field. The company operates three specialized factories, with its pipe and profile facility covering 26,650 square meters in Zhangjiagang City, only two hours from Shanghai airport, and reaches customers across 100 plus exported regions through the Wanplas group network. This article explains how an anti corrosion HDPE chemical đường ống nén bằng ống is designed and operated for factory acid alkali medium transportation pipelines, and how Faygo configures these lines for stable, fully welded, long service life pipe systems.
Chemical plants, electroplating shops, pharmaceutical sites and mining operations move aggressive liquids every day: dilute sulfuric acid, hydrochloric acid, sodium hydroxide, mixed process waste, organic solvents and abrasive slurries. Carbon steel corrodes, lined steel is costly to maintain, and rigid PVC is limited in temperature and impact resistance. High density polyethylene, particularly PE100 grade HDPE with MRS 10 MPa rating, offers a corrosion free, lightweight and weldable alternative that is produced continuously on a đường ống nén bằng ống. The following sections cover the media that HDPE resists, why it is chosen, how the material grades and pressure classes work, the full extrusion process, the sizing and cooling technology, quality control, welding, defect troubleshooting, line speed and capacity, maintenance, plant layout, safety and the Faygo line configurations available for this application.
1. Application Scenarios and Chemical Media
An anti corrosion HDPE chemical đường ống nén bằng ống produces pipe intended to carry aggressive media inside process plants and between plant battery limits. The pipe must survive continuous contact with the medium, resist permeation, keep a smooth bore for flow, and join into a leak free network. HDPE is selected when the medium is corrosive, when weight and installation cost matter, and when a homogeneous welded joint is preferred over flanged metal sections.
The table below summarizes the chemical resistance of HDPE against typical factory media. Resistance ratings are technical, based on the non polar, saturated hydrocarbon structure of polyethylene, and should always be verified against the actual concentration, temperature and exposure time. No brand or formulation name is referenced because the pipe is made from generic PE100 or PE80 grade HDPE compound.
HDPE chemical resistance against common factory media
| Medium | Typical condition | HDPE resistance | Technical note |
|---|---|---|---|
| Sulfuric acid (dilute) | up to 60 percent, ambient to 40 C | Excellent | Stable at low to medium concentration |
| Hydrochloric acid | up to 35 percent, ambient | Excellent | Non oxidizer, well tolerated |
| Sodium hydroxide | up to 50 percent, ambient to 60 C | Excellent | No hydrolysis of polyolefin |
| Mixed process waste | variable pH, salts | Good | Verify concentration and temperature |
| Aliphatic hydrocarbons | fuel oil, gasoline | Good | Slight swelling at high temperature |
| Aqueous salt solutions | brine, chlorides | Excellent | No chloride stress cracking like steel |
| Aromatic solvents | benzene, toluene | Limited | Swelling and loss of strength |
| Chlorinated solvents | Clo metyl | Not recommended | Severe attack on polyolefin |
| Strong oxidizers | conc. nitric, chromic acid | Not recommended | Oxidative degradation |
| Abrasive slurry | tailings, fly ash | Good | Low friction bore reduces wear |
Đối với các môi trường được đánh dấu là hạn chế hoặc không được khuyến nghị, nhà máy nên chuyển sang lớp lót chống hóa chất hoặc polymer khác, và đường ống nén không phải là yếu tố quyết định. Giá trị của HDPE nằm chính xác trong gia đình lớn các chất axit, kiềm và muối chiếm ưu thế trong nước thải nhà máy và dịch vụ chuyển tiếp.
Resistance is never absolute; it moves with both concentration and temperature. A medium that is fully tolerated at ambient temperature can attack the polymer at elevated temperature because molecular motion increases and permeation accelerates. Similarly a dilute acid may be safe while the same acid at high concentration becomes aggressive. For this reason the pipe specifier records the worst case concentration and the highest continuous and peak temperature of the duty, then selects the PE grade and the SDR against that envelope. The non polar, saturated carbon chain of HDPE is why it ignores most aqueous corrosives: there is no ester, amide or metal site for acid or alkali to attack, so the material neither dissolves nor hydrolyzes in water based media. This chemical inertness is what makes an anti corrosion HDPE chemical đường ống nén bằng ống a durable choice for continuous acid alkali service rather than a coated metal compromise.
2. Why Choose HDPE for Corrosive Medium Transport
HDPE earns its place in chemical pipelines because it is inert to most aqueous corrosives, it is light enough to handle without cranes at small diameters, it is flexible enough to absorb ground movement, and it forms homogeneous welded joints. Compared with alternative piping materials, HDPE trades some temperature ceiling for much simpler corrosion management and lower lifetime cost of ownership.
Comparison with PVC, PP, steel lined and FRP
| Material | Chemical resistance to acids/alkalis | Continuous temp ceiling | Density (g/cm3) | Joint reliability | Install difficulty |
|---|---|---|---|---|---|
| HDPE (PE100),, | Excellent for aqueous acids/alkalis | up to 40 C service, 60 C short | 0.95 | Excellent (butt fusion) | Easy |
| PVC (rigid) | Good, but brittle on impact | up to 60 C | 1.40 | Solvent cement, moderate | Moderate |
| PP | Good, better temp than HDPE | up to 80 C | 0.91 | Welded, good | Moderate |
| Steel with anti corrosion lining | Good if lining intact | high, above 100 C | 7.85 | Flanged, leak risk at gasket | Hard |
| FRP (glass fiber reinforced) | Good, resin dependent | up to 90 C resin dependent | 1.5 to 2.0 | Adhesive or flange, skill dependent | Hard |
The comparison is material to material, not brand to brand. HDPE wins on corrosion freedom and joint integrity for aqueous acid alkali service at moderate temperature, while PP or lined steel take over when the temperature exceeds the HDPE ceiling. The extrusion line is engineered so the resulting pipe keeps the wall uniformity that makes these properties reliable in the field.
3. PE100 and PE80 Material Grades, SDR and Pressure Classes
Polyethylene pipe compounds are graded by their hydrostatic design basis. PE80 and PE100 are the two common grades for pressure pipe, defined by their Minimum Required Strength (MRS) in MPa at 20 degrees Celsius over a 50 year reference life. PE100 grade HDPE with MRS 10 MPa rating provides higher allowable stress than PE80 with MRS 8 MPa, so for the same pressure a PE100 pipe can be thinner walled or a given wall can carry higher pressure.
Wall thickness is set by the Standard Dimension Ratio, SDR, which is the ratio of outside diameter to wall thickness. A lower SDR means a thicker wall and higher pressure capacity. The pressure class, PN, is the nominal pressure the pipe withstands at 20 degrees Celsius. For PE100, typical pairings are SDR11 with PN16, SDR17 with PN10 and SDR26 with PN6. The same SDR on PE80 yields a lower PN because the allowable stress is smaller. Temperature derating applies: as service temperature rises the allowable pressure falls, so chemical plants operating above 20 degrees Celsius must select a thicker SDR or accept a lower PN.
Material grade and SDR reference
| Grade | MRS (MPa) | Lower reference performance limit (MPa) | SDR example | Resulting PN at 20 C |
|---|---|---|---|---|
| PE80 | 8 | 6.4 | SDR11 | PN12.5 |
| PE100, | 10 | 8.0 | SDR11 | PN16 |
| PE100, | 10 | 8.0 | SDR17; | PN10 |
| PE100, | 10 | 8.0 | SDR26; | PN6 |
The extrusion line must hold wall thickness within tight tolerance because the SDR and therefore the PN depend on it. A thin spot is the weakest point in the whole pipeline, so sizing and metering accuracy are the heart of an anti corrosion HDPE chemical đường ống nén bằng ống.
The MRS values are derived from a 50 year design life at 20 degrees Celsius, which is the reference basis used across the pipe industry. In real chemical plants the service temperature is often above 20 degrees Celsius, and polyethylene loses allowable stress as temperature rises. A practical way to apply this is to compute the pressure capability at the actual temperature and then choose an SDR that leaves a safety margin, rather than selecting PN at 20 degrees Celsius and hoping the margin covers the heat. For example a line running near 40 degrees Celsius should use a thicker SDR than the same line at ambient, or accept a lower continuous pressure. The extrusion line supports this discipline by holding the wall so uniformly that the rated SDR is real along the entire pipe length, not just at a sampled point.
4. HDPE Chemical Sản xuất ống Process Flow
HDPE pipe is made by melting a compounded granulate, shaping it in a die, fixing the dimensions by vacuum sizing and cooling, then cutting to length. Unlike PVC, HDPE is a thermoplastic that does not release corrosive gas and does not need strong shear devolatilization, so a high speed single screw extruder is the standard choice rather than a twin screw extruder. The process steps below apply to a complete chemical đường ống nén bằng ống.
Process sequence
- Material preparation: HDPE base resin is blended with a color masterbatch for identification and an antioxidant masterbatch to protect against thermal oxidative degradation during processing and service. The blend is metered by a gravimetric feeder for stable output.
- Single screw extrusion: a high speed single screw extruder plasticizes the compound. Because HDPE viscosity varies with shear, a gear type metering pump (also called a melt pump) is fitted after the barrel to deliver pulse free, constant melt flow to the die, which stabilizes wall thickness independent of screw speed fluctuation.
- Spiral mandrel die: the melt enters a spiral mandrel die where a helical channel wraps the melt around the mandrel, eliminating weld lines and giving uniform wall thickness around the full circumference. The die gap sets the initial wall.
- Vacuum sizing: the just formed pipe enters a vacuum sizing sleeve where vacuum pulls the outside against a calibrated, water cooled copper or aluminum sleeve, fixing the outside diameter and roundness. An internal cooling mandrel controls the bore.
- Spray or immersion cooling: the pipe passes through multiple cooling tanks with spray nozzles or immersion baths held at staged temperatures. Gradual cooling controls crystallization and residual stress.
- Coding: an ink jet or laser coder prints the size, grade (PE100), SDR and standard on the pipe surface for traceability.
- Haul off:một xe tải con lăn bắt giữ ống và kéo nó theo tốc độ đường dây được thiết lập. Tốc độ ổn định kiểm soát độ dày của tường.
- Cutting: a Cutter hành tinh or Cutter tròn severs the pipe at the set length with a square end. Large coils may be wound instead of cut.
- Stacking or coiling: pipes are discharged to a tipping table or wound onto a reel for small diameters.
The combination of a single screw extruder with a gear pump and a spiral mandrel die is the reason HDPE chemical pipe holds tight wall tolerance and a smooth inner surface. This is the configuration Faygo builds into its đường ống nén bằng ốngs.
The single screw itself uses a barrier or mixing section to complete plasticizing at a controlled melt temperature, because HDPE has a narrow safe window and overheating causes oxidative degradation that shows as yellowing and gel. The barrel is divided into feed, compression and metering zones, each with its own temperature set point, and the melt pressure is read at the barrel exit so the screen pack and filter are changed before pressure spikes. Placing the gear pump after the barrel decouples output stability from screw pulsation: the pump delivers a constant volumetric flow to the die even as screw speed or back pressure varies, which is the single biggest contributor to uniform wall thickness on a high speed line. The energy cost of the pump is small next to the scrap it prevents.
Faygo PE / HDPE Dây chuyền đùn ống 20 to 160 mm
This line covers the dominant chemical plant diameters for branch and header pipe, built on the Faygo pipe extrusion platform that handles PE, PVC and PP materials. It is configured for HDPE with a high speed single screw extruder plus metering pump.
| Parameter | Specification |
|---|---|
| Screw diameter | 65 mm |
| L/D ratio | 33:1 |
| Main motor power | 55 kW |
| Dải đường kính ống: 16 mm đến 40 mm, có thể cấu hình lên đến 63 mm | 20 to 160 mm |
| Line speed | 0.4 to 8.0 m/min (depends on diameter and wall) |
| Capacity | 150 to 320 kg/h |
| Installed power | approx. 110 kW |
5. Vacuum Sizing and Cooling Technology
Kiểm soát kích thước ống HDPE gần như hoàn toàn phụ thuộc vào kích thước và phần điều hòa nhiệt độ. Ống sấy bằng chân không là một ống được khoan chính xác, có lớp bao bằng nước và có các khe chân không. Khi ống nóng đi vào, chân không sẽ kéo lớp nhựa mềm chống lại thành ống, do đó đường kính bên ngoài được khóa với đường kính ống, trong khi nước điều hòa bên trong làm mát lớp tiếp xúc. Kết quả là ống có đường kính bên ngoài chính xác, độ tròn tốt và bề mặt bóng.
For larger diameters, internal pressure sizing is used. A sealed internal cooling mandrel is pressurized with water or air so the pipe is pushed outward against the sizing sleeve from inside, which improves roundness and cools the bore faster. This internal cooling method suits large diameter HDPE chemical pipe where wall thickness is high and external cooling alone is too slow.
Cooling length and line speed must be matched. If the pipe leaves the cooling section before its core solidifies, it will ovalize or sag under its own weight. Multi stage temperature control, starting cooler at the die end and slightly warmer downstream, reduces thermal shock, limits internal stress and improves impact toughness. Residual stress is checked by the longitudinal reversion test, where a cut ring is heated in a bath and its length change is measured.
The vacuum sizing sleeve is normally made from a low friction, heat conducting metal such as copper or aluminum alloy, with a mirror finished bore that transfers its geometry straight to the pipe surface. The vacuum level is tuned to the wall thickness: thin wall pipe needs gentle vacuum to avoid collapse, thick wall pipe needs enough vacuum to seat the melt against the sleeve through its full circumference. Between production runs the sleeve is cleaned and descaled because mineral deposit from the cooling water is the most common cause of out of round pipe. For internal pressure sizing the sealed mandrel is fed with tempered water so the bore cools from inside while the outside is held by the sleeve, which is especially effective on large diameter chemical trunk pipe where the wall is thick and external cooling alone would leave a soft core.
6. Key Process Parameters and Online Quality Control
An anti corrosion HDPE chemical đường ống nén bằng ống is instrumented so that quality is controlled during running, not only by off line inspection. The melt temperature in the barrel is kept in the HDPE processing window of roughly 200 to 230 degrees Celsius to avoid thermal degradation while ensuring full plasticizing. Melt pressure is monitored at the die to detect screen pack blockage and to stabilize output.
Key quality parameters
| Parameter | Typical target | Why it matters |
|---|---|---|
| Dải đường kính ống: 16 mm đến 40 mm, có thể cấu hình lên đến 63 mm | 20 to 630 mm | Covers branch to trunk chemical lines |
| Wall thickness tolerance | per ISO 4427 tolerance table | Sets SDR and PN reliability |
| Roundness | within diameter tolerance band | Needed for leak free joints |
| Inner surface roughness | smooth, low Ra | Reduces flow loss and fouling |
| Longitudinal reversion | within standard limit | Indicates residual stress |
| Hydrostatic resistance 20 C 100 h | no failure at test pressure | Short term proof of strength |
| Hydrostatic resistance 80 C 165 h | no failure at test pressure | Long term resistance proof |
| Melt flow and OIT | per compound spec | Confirms grade and antioxidant level |
Online inspection devices
- Thiết bị đo đường kính bằng laser:quét đường kính bên ngoài liên tục và cung cấp tốc độ kéo ra để khắc phục sự lệch.
- Thiết bị cảm biến độ dày tường bằng siêu âm:thực hiện đo chiều dày và độ lệch tâm xung quanh ống, cảnh báo về các điểm mỏng.
- Thiết bị cảm biến áp suất và nhiệt độ của hỗn hợp:ở ống và khuôn, để ổn định quá trình làm mềm và cảnh báo sớm về tình trạng bị vặn vẹo.
- Kiểm tra đầu tiên và loại ống:các mẫu được cắt và kiểm tra theo các tham chiếu ISO 4427 và GB/T, và mỗi lô sản xuất được ghi lại để theo dõi.
Hai thử nghiệm kết hợp xác nhận ống sẽ không bị lão hóa trong quá trình sử dụng. Chỉ số dòng chảy hỗn hợp, được đo trên hạt và ống hoàn thành, chứng minh loại ống không thay đổi trong quá trình chế tạo; sự thay đổi lớn sẽ báo hiệu sự suy giảm hoặc lô sản xuất sai. Thời gian khởi phát oxy hóa, OIT, đo thời gian bộ chống oxy hóa chống lại oxy hóa ở nhiệt độ cao, và thời gian OIT ngắn cảnh báo rằng hàm lượng phụ gia là thấp hoặc hỗn hợp quá nóng. Vì ống nhựa thường nằm trong các hố ấm, tiếp xúc với oxy trong nhiều thập kỷ, OIT là một cửa sổ chất lượng có ý nghĩa hơn so với ngoại hình đơn lẻ, và Faygo ghi lại nó cho lô sản xuất cùng với đường kính và bản đồ dày.
7. Welding and Jointing of HDPE Chemical Pipe
The corrosion freedom of HDPE is only useful if the joints are as durable as the pipe. Three jointing methods dominate chemical pipeline work. Butt fusion joins two pipe ends by heating them on a mirror plate, then pressing them together so the melt fuses into one homogeneous wall. For PE100 pipe above about 63 millimeters this is the standard, and the joint can reach the full strength of the pipe when the ends are square and clean.
Liên kết bằng điện uses a coupler with embedded heating wire; the pipe ends are scraped, inserted and energized so the coil melts both surfaces. It is preferred for repairs, tie ins and confined spaces. Flange adapters connect HDPE pipe to pumps, valves and steel equipment, combining a molded HDPE stub end with a loose steel backing flange. For all methods the pipe end must be cut square and free of debris, which is why the extrusion line cutter must hold a tight squareness tolerance.
8. Common Defects and Countermeasures
Even a well built line produces defects if process settings drift. The table below lists the common defects on an HDPE chemical đường ống nén bằng ống with their likely causes and remedies. It is the field checklist Faygo supplies with each line and trains operators to use.
Bảng khắc phục lỗi
| Không. | Defect | Likely cause | Countermeasure |
|---|---|---|---|
| 1 | Roundness out of tolerance | Vị trí chân không quá thấp, vỏ mòn, làm mát không đều | Tăng áp suất chân không, khoan lại hoặc thay vỏ, cân bằng phun |
| 2 | Kích thước dày của thành bên trong lệch tâm | Khe khuôn không đều, trục mắc lệch tâm | Adjust die bolts, center mandrel, check ultrasonic data |
| 3 | Surface yellowing or burn | Melt over 230 C, dwell in barrel | Lower barrel temp, raise screw speed, add antioxidant |
| 4 | Inner wall scratches | Internal mandrel or cooling pipe scored | Polish or replace internal mandrel, clean cooling path |
| 5 | Sizing not round | Sleeve scaling, vacuum leak | Descale sleeve, seal vacuum chamber |
| 6 | Cooling insufficient, deformation | Line speed too high, water flow low | Slow line, raise cooling water flow and staging |
| 7 | Unclear coding | Ink low, surface wet, head offset | Refill ink, dry surface, align coder |
| 8 | Cut surface bevel | Cutter not square, blade worn | Square the cutter, replace blade, check clamp |
| 9 | Gels or fisheye (晶点/凝胶) | Crosslinked particles, dirty melt | Improve screen pack, clean barrel, check resin |
| 10 | Color variation | Masterbatch dose unstable | Calibrate gravimetric feeder, mix resin lot |
| 11 | Longitudinal reversion over limit | Quench too fast, high internal stress | Stage cooling temps, slow haul off slightly |
| 12 | Uneven pipe end (port not flat) | Cutter mis set, pipe slipping | Re square cutter, secure haul off grip |
| 13 | Orange peel surface | Melt too cold, die land too long | Raise melt temp, check die land finish |
| 14 | Pipe telescoping in tank | Haul off faster than extruder | Match haul off to output via pump feedback |
9. Line Speed, Capacity and Energy Consumption
Line speed and capacity depend on pipe diameter and wall, because a large thick pipe needs more melt and more cooling time. Small diameter thin wall pipe runs fast, while a 630 millimeter trunk pipe runs slowly but delivers high mass output. The table gives typical reference values for an HDPE chemical đường ống nén bằng ống; actual figures vary with grade, SDR and cooling water temperature.
Typical speed, capacity and energy
| Diameter range | Line speed (m/min) | Capacity (kg/h) | Specific energy (kWh/kg) |
|---|---|---|---|
| 20 to 63 mm | 2.0 to 12.0 | 80 to 180 | 0.35 to 0.55 |
| 75 to 160 mm | 0.4 to 8.0 | 150 to 320 | 0.30 to 0.45 |
| 315 to 630 mm | 0.2 to 3.0 | 400 to 700 | 0.28 to 0.40 |
Specific energy falls as diameter grows because the metering pump and screw run closer to their efficient point and the surface to volume ratio drops. Servo driven haul off and inverter controlled auxiliaries further lower the kWh per kilogram. Energy is a physical quantity only; no price is stated here.
10. Equipment Maintenance Schedule
A planned maintenance schedule keeps the line producing in spec pipe and avoids unplanned stoppage. Faygo organizes maintenance into shift, weekly and monthly tasks, mirroring a product lifecycle management approach on the machine level.
Maintenance tasks by interval
- Per shift: clean the die lip and vacuum sleeve area of dust and melt smear, check haul off belt tension, verify coder ink and cooling water clarity, log melt pressure and temperature.
- Per week: inspect and descale the vacuum sizing sleeve, check the gear pump coupling, clean the screen pack area, confirm cutter blade sharpness and squareness.
- Per month: calibrate temperature controllers against a reference probe, inspect the screw and barrel for wear, lubricate the haul off gearbox, verify the laser gauge against a standard ring, review the ultrasonic wall map history.
- Per quarter: full barrel and screw inspection, replace worn sleeve or mandrel, check electrical terminals and grounding, validate the cooling tower and water treatment.
Water quality in the cooling circuit matters: hardness scale inside the sizing sleeve degrades roundness, so a softened or filtered loop is recommended. Records of each task support traceability and help predict part replacement before failure.
11. Plant Layout and Utility Requirements
A complete HDPE chemical đường ống nén bằng ống is long because cooling takes linear space. Small lines fit within roughly 20 meters, while a 630 millimeter line with extended cooling and a coil station can exceed 30 meters. The plant needs a flat, load bearing floor, sufficient overhead clearance for die and sleeve changes, and space at the outfeed for cutting and stacking.
Utility reference
| Utility | Small line | Large line |
|---|---|---|
| Line length | 18 to 22 m | 30 plus m |
| Power supply | approx. 150 kVA | approx. 400 kVA |
| Cooling water | 8 to 15 m3/h | 25 to 45 m3/h |
| Floor load | standard industrial | reinforced for heavy pipe |
| Overhead clearance | 4 m | 5 m plus |
These figures are planning references; the exact layout is developed in the factory design service that Faygo offers as part of its turnkey support, including three dimensional workshop drawing, water and electricity design, and worker configuration.
12. Safety, Dust, Noise and Environmental Compliance
HDPE extrusion is a low emission process, but a few hazards need control. The gravimetric blending and feeding of masterbatch creates fine dust at the hopper, so local extraction at the feed throat is recommended and operators wear basic dust protection during material handling. The barrel and die run at melt temperature, so guarding and lockout are required for any work near the die.
Noise comes mainly from the haul off and cutter; enclosures and hearing protection keep the work area within occupational limits. Coolant is recycled through a closed loop with filtration, so water use stays low and warm water can be recovered for plant heating. For pipes intended for food grade or potable contact, the compound path follows restricted substance controls aligned with RoHS and REACH routes, using only registered additives and documenting the formulation. These are plain text references to the control frameworks, not certification claims.
13. Faygo HDPE Chemical Dây chuyền đùn ống Series
Faygo builds its chemical pipe lines on the same pipe extrusion platform that covers 12 to 575 millimeter diameter PE, PVC and PP pipe with wall thickness up to 6.5 millimeters, used across water supply, drainage, gas, communication and agricultural irrigation. For HDPE chemical duty the lines are specified with a high speed single screw extruder, metering pump, spiral mandrel die and vacuum sizing, plus the online inspection package described above. Below are two representative configurations.
Faygo Large Diameter HDPE Pipe Line 315 to 630 mm
Dây này phục vụ các đường ống chính của nhà máy hóa học và chuyển giao quy mô thành phố khi cần lượng chất rắn lớn và tường SDR dày. Nó sử dụng kích thước áp suất bên trong cho đường kính lớn.
| Parameter | Specification |
|---|---|
| Screw diameter | 120 mm |
| L/D ratio | 33:1 |
| Main motor power | 160 kW |
| Dải đường kính ống: 16 mm đến 40 mm, có thể cấu hình lên đến 63 mm | 315 to 630 mm |
| Line speed | 0.2 to 3.0 m/min |
| Capacity | 400 to 700 kg/h |
| Installed power | approx. 280 kW |
Both lines share the Faygo intelligent control system that lets operators set parameters freely and adjust them in real time, with internationally sourced electrical components for reliability. Every line is CE and ISO certified and passes a 72 hour continuous operation test before delivery.
14. Requirement to Model Selection Recommendation
The table below maps a typical customer requirement to a recommended Faygo configuration. It is a starting point; final selection also depends on the medium concentration, service temperature and local standard.
Selection recommendation
| Medium and duty | Diameter | Target capacity | Recommended Faygo line |
|---|---|---|---|
| Dilute acid or alkali, branch line | 20 to 63 mm | 80 to 180 kg/h | Faygo 20 to 160 mm HDPE line, small config |
| Nước thải công nghiệp, đường ống chính của nhà máy | 75 to 160 mm | 150 to 320 kg/h | Faygo 20 to 160 mm HDPE line, upper config |
| Trunk chemical transfer, high volume | 315 to 630 mm | 400 to 700 kg/h | Faygo 315 to 630 mm large diameter HDPE line |
| Abrasive slurry (tailings) | 110 to 315 mm | 200 to 500 kg/h | Faygo line with thicker SDR and wear resistant sizing |
15. Các ngành ứng dụng and End Products
Faygo đường ống nén bằng ốngs serve the industries below with concrete end products. These are the real application areas from the Faygo profile, mapped to anti corrosion HDPE chemical pipe end uses.
Industry to end product
- Chemical plants: dilute sulfuric acid and hydrochloric acid transfer pipe, sodium hydroxide return lines, mixed process waste headers, all made from PE100 grade HDPE with MRS 10 MPa rating.
- Electroplating and PCB workshops: acidic and alkaline rinse water pipe, etchant recovery lines, where HDPE resists the plating chemistry and the smooth bore limits scaling.
- Pharmaceutical and food grade: purified water and clean medium pipe built on a RoHS and REACH aligned compound path for contact duty, with full traceability.
- Khai thác: tailings slurry pipe and process water lines, where low friction bore and abrasion resistance extend service life.
- Nông nghiệp và hệ thống tưới vườn:Hệ thống ống PE chảy và phun nước có thể được sử dụng như đường ống dung dịch phân bón nhẹ, hưởng lợi từ sự không bị ăn mòn của HDPE.
- Municipal engineering:Tấm ống HDPE có đường kính lớn, cùng nền tảng thích hợp cho các nhiệm vụ không hóa học nhưng đòi hỏi áp suất cao.
16. Service and Support
Faygo, a Wanplas factory, supports every anti corrosion HDPE chemical đường ống nén bằng ống through the full lifecycle. Each line is run through a 72 hour continuous operation test before shipment to confirm stable extrusion, accurate sizing, steady haul off and square cutting. Engineers assist with installation and commissioning at the customer site, and operators receive training on setup, troubleshooting and maintenance using the defect table above.
The Wanplas group service policy applies: USD 500 free parts per year, free replacement of damaged parts within warranty, 24/7 online technical support, and remote monitoring of the control system so abnormalities can be analyzed from the factory. Faygo also welcomes open factory visits for inspection and runs a factory consulting service covering water and electricity design, three dimensional workshop layout, worker configuration and training, new factory construction as a turnkey project, old machine replacement with minimal downtime, and capacity expansion by optimizing bottlenecks. The end to end service covers selection, design, manufacturing, installation, commissioning, training and maintenance.
Câu hỏi thường gặp
Tại sao HDPE được ưa chuộng hơn PVC hoặc thép cho đường ống dẫn chất trung tính axit và kiềm?
HDPE chống lại một loạt các loại axit loãng, chất loãng và dung dịch muối không bị ăn mòn, và nó không cần lớp lót bên trong hoặc bảo vệ cathode. PVC rẻ hơn nhưng hạn chế về độ cứng chịu va đập và nhiệt độ, trong khi thép cần lớp lót chống ăn mòn liên tục và bị ăn mòn trong môi trường chứa muối. HDPE cũng được hàn thành một liên kết hoàn toàn đồng nhất, không bị rò rỉ thông qua hàn chéo.
What extruder type is used for HDPE chemical pipe, single screw or twin screw?
Ống HDPE thường được sản xuất trên máy ép vít một vít tốc độ cao được trang bị bơm đo lường kiểu răng để cung cấp chất lỏng nóng ổn định và không có xung. Máy ép vít hai vít được sử dụng cho pha trộn bột PVC và ống PVC cứng vì PVC bị phân hủy nếu không có lực cắt mạnh và loại bỏ chất lỏng. Đối với HDPE, kết hợp máy ép vít một vít và bơm đo lường kiểu răng cho hiệu suất ổn định và kiểm soát độ dày của tường tốt nhất.
Làm thế nào để kiểm soát đường kính và độ dày của ống trong quá trình nén?
A spiral mandrel die distributes melt evenly around the circumference, then a vacuum sizing sleeve calibrates the outside diameter under vacuum while a sealed internal cooling mandrel controls the bore. Thiết bị đo đường kính bằng lasers and ultrasonic wall thickness sensors give closed loop feedback to the haul off speed and extruder rpm, holding roundness and eccentricity inside the tolerance bands of ISO 4427.
Loại áp suất nào nên được chọn cho đường ống vận chuyển hóa học?
Pressure class is set by the PE grade, the SDR (standard dimension ratio) and the service temperature. For PE100, SDR11 typically serves PN16 at 20 degrees Celsius, SDR17 serves PN10 and SDR26 serves PN6. Chemical plants should select the SDR that yields the required pressure margin at the operating temperature, and verify the medium concentration against the material resistance table.
Các phương pháp hàn nào được khuyến nghị cho ống HDPE hóa chất?
Liên kết bằng cách ghép chặt là tiêu chuẩn cho các điểm nối ống với nhau ở đường kính trên 63 milimet, tạo ra một điểm nối có độ bền tương đương với ống chính. Các bộ kết nối bằng cách ghép bằng điện được sử dụng cho các công việc sửa chữa, nối kết và các khu vực bị hạn chế, trong khi các bộ chuyển đổi bằng vát kết nối ống HDPE với van và máy bơm. Kết thúc ống vuông, sạch sẽ là điều cần thiết cho các điểm nối ghép chặt có độ bền cao.
Các thử nghiệm chất lượng nào được thực hiện trước khi đường ống HDPE được vận chuyển?
Faygo runs a 72 hour continuous operation test on every line before delivery, checking extruder stability, vacuum sizing accuracy, haul off tracking and cutter squareness. Sample pipes are inspected for diameter, wall thickness, roundness, longitudinal reversion and hydrostatic resistance per ISO 4427 and GB/T references, and the line is documented with a traceable production record.
Kết Luận
An anti corrosion HDPE chemical đường ống nén bằng ống turns PE100 grade HDPE with MRS 10 MPa rating into a continuous, weldable, corrosion free pipeline for factory acid alkali medium transport. The winning combination is a high speed single screw extruder with a metering pump, a spiral mandrel die for uniform wall, vacuum sizing with controlled cooling, and online laser and ultrasonic inspection that locks diameter and wall thickness to the SDR that defines the pressure class. With proper grade selection, butt fusion jointing and the defect troubleshooting discipline described here, the pipe serves chemical, electroplating, pharmaceutical, mining and irrigation duty with long, low maintenance life.
Faygo, a Wanplas factory with 22 years of pipe extrusion experience and three specialized factories, offers HDPE chemical pipe lines from 20 to 630 millimeter diameter, each tested for 72 hours before shipment and backed by the Wanplas group service promise including USD 500 free parts per year and open factory visits. If you are planning a chemical medium pipeline project, send your medium, diameter, wall, capacity and site conditions, and our engineers will propose a tailored line configuration, arrange a factory audit, and run a sample trial so you can verify pipe quality before committing.
