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 лінія екструзії труб 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 лінія екструзії труб. 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 лінія екструзії труб 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 | Добрий | Verify concentration and temperature |
| Aliphatic hydrocarbons | fuel oil, gasoline | Добрий | 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 | methylene chloride | Not recommended | Severe attack on polyolefin |
| Strong oxidizers | conc. nitric, chromic acid | Not recommended | Oxidative degradation |
| Abrasive slurry | tailings, fly ash | Добрий | Low friction bore reduces wear |
Для середовищ, які позначені як обмежені або не рекомендовані, завод повинен перейти на спеціальне хімічно стійке покриття або інший полімер, а лінія екструзії не є вирішальним фактором. Значення HDPE саме в великій родині водних кислот, лугів і солей, які домінують у відходах фабрики та при передачі між операціями.
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 лінія екструзії труб 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 | Хімічна стійкість 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 |
Порівняння проводиться між матеріалами, а не між марками. HDPE перемагає за стійкістю до корозії та цілісністю швів при експлуатації в умовах водних кислот і лужів при помірній температурі, тоді як PP або сталь з внутрішнім покриттям беруть верх, коли температура перевищує верхню межу для HDPE. Лінія екструзії проектується так, щоб отриманий трубопровід зберігав однорідність стін, що забезпечує надійність цих властивостей на місці застосування.
3. PE100 and PE80 Material Grades, SDR and Класа тискуes
Композиції поліетиленових труб класифікуються за їх гідростатичною конструкційною основою. PE80 і PE100 є двома загальними класами для труб під тиском, які визначені їх мінімальною необхідною міцністю (МНМ) в МПа при 20 градусах Цельсія протягом 50-річного періоду експлуатації. Клас HDPE PE100 з рейтингом МНМ 10 МПа забезпечує вищу допустиму напругу, ніж PE80 з МНМ 8 МПа, тому для того ж тиску труба PE100 може мати тонші стінки або певна стіна може витримувати більший тиск.
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) | Приклад SDR | Resulting PN at 20 C |
|---|---|---|---|---|
| PE80 | 8 | 6.4 | SDR11 (СДР11) | PN12.5 |
| PE100 | 10 | 8.0 | SDR11 (СДР11) | PN16 |
| PE100 | 10 | 8.0 | SDR17 (СДР17) | PN10 |
| PE100 | 10 | 8.0 | SDR26 | PN6 |
На лінії екструзії необхідно дотримуватися точних параметрів товщини стінки, оскільки значення SDR і, відповідно, тиск PN залежать від цього параметра. Тонка точка є найслабшим місцем у всій трубопровідній системі, тому точність розрахунку та вимірювання є основою антикорозійної лінії екструзії хімічних труб з ПЕ.
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 Виготовлення труб 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 лінія екструзії труб.
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:Плавка потрапляє в спирально-мандетний прес, де гвинтова канавка обмотує плавку навколо манделі, усуваючи шви і забезпечуючи однакову товщину стінок по всій окружності. Відстань між пресом і манделем задає початкову товщину стінки.
- Vacuum sizing:Тільки що сформована труба потрапляє в вакуумний розмірний циліндр, де вакуум тягне зовнішній діаметр назовні проти каліброваного, охолодженого водою циліндра з міді або алюмінію, закріплюючи зовнішній діаметр і круглість. Внутрішній охолоджуючий манжет контролює внутрішній діаметр.
- 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: a caterpillar haul off grips the pipe and pulls it at the set line speed. Speed stability directly controls wall thickness.
- Cutting: a planetary cutter or chipless cutter 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 лінія екструзії трубs.
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 Лінія екструзії труб 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.
| Параметр | Specification |
|---|---|
| Screw diameter | 65 mm |
| L/D ratio | 33:1 |
| Main motor power | 55 kW |
| Pipe diameter range | 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
Dimension control of HDPE pipe depends almost entirely on the sizing and cooling section. The vacuum sizing sleeve is a precision bored, water jacketed cylinder with vacuum slots. When the hot pipe enters, vacuum draws the soft melt against the sleeve wall so the outside diameter is locked to the sleeve bore while internal cooling water chills the contact layer. The result is a pipe with accurate outside diameter, good roundness and a glossy surface.
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 лінія екструзії труб 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
| Параметр | Typical target | Why it matters |
|---|---|---|
| Pipe diameter range | 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
- Laser diameter gauge: scans the outside diameter continuously and feeds the haul off speed to correct drift.
- Ultrasonic wall thickness sensor: measures wall and eccentricity around the pipe, warning on thin spots.
- Melt pressure and temperature transducer: at the barrel and die, for stable plasticizing and early screen pack warning.
- First article and type inspection: samples are cut and tested per ISO 4427 and GB/T references, and each production lot is recorded for traceability.
Two compound tests confirm the pipe will age well in service. The melt flow index, measured on the granulate and on the finished pipe, confirms the grade has not changed during processing; a large shift would signal degradation or a wrong lot. The oxidation induction time, OIT, measures how long the antioxidant package resists oxidation at an elevated temperature, and a short OIT warns that the masterbatch dose was low or the melt ran too hot. Because chemical pipe often sits in warm, oxygen exposed trenches for decades, OIT is a more meaningful quality gate than appearance alone, and Faygo records it for the production lot alongside the diameter and wall map.
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.
Electrofusion 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 лінія екструзії труб with their likely causes and remedies. It is the field checklist Faygo supplies with each line and trains operators to use.
Defect troubleshooting table
| No. | Defect | Likely cause | Countermeasure |
|---|---|---|---|
| 1 | Roundness out of tolerance | Vacuum too low, sleeve worn, cooling uneven | Raise vacuum, re bore or replace sleeve, balance spray |
| 2 | Ексцентричність товщини стінки | Die gap uneven, mandrel off center | 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 лінія екструзії труб; 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 |
Кількість енергії падає з ростом діаметра, оскільки насос для дозаправки і гвинт рухаються ближче до своєї ефективної точки, а відношення поверхні до об'єму падає. Сервоприводне транспортування і регулювання допоміжних пристроїв за допомогою інвертора далі знижують кВт·год на кілограм. Енергія є фізичною величиною, і ціна не вказана тут.
10. Equipment Maintenance Schedule
Плановий графік технічного обслуговування дозволяє виробляти труби відповідно до специфікації і уникати незапланованих простоїв. Faygo організовує технічне обслуговування за періодами: за зміну, тиждень і місяць, що відповідає підходу управління циклом життя продукту на рівні машини.
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:Перевірте та очистіть вакуумний розмірний циліндр, перевірте з'єднання насосної пари, очистіть область екрана, перевірте гострість ножа та прямолінійність.
- Per month:Повний огляд барабана та гвинта, заміна зношеного циліндра або манжети, перевірка електричних терміналів та заземлення, перевірка охолоджувальної башти та очищення води.
- Per quarter:Обидві лінії діляться інтелектуальною системою управління, яка дозволяє операторам вільно встановлювати параметри та регулювати їх в реальному часі, використовуючи електричні компоненти міжнародного виробництва для надійності. Кожна лінія сертифікована за CE та ISO і проходить 72-годинний тест безперервної роботи перед поставкою.
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
Повна лінія екструзії труб з ПЕВД велика, оскільки охолодження займає лінійний простір. Малі лінії займають приблизно 20 метрів, а лінія діаметром 630 мм з розширеним охолодженням і станцією для намотування може перевищувати 30 метрів. Заводу потрібна рівна, несуча підлога, достатній простір у вихідному кінці для різання і складання.
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 Лінія екструзії труб 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
This line serves chemical plant trunk lines and municipal scale transfer where high mass output and thick SDR walls are needed. It uses internal pressure sizing for large diameter roundness.
| Параметр | Specification |
|---|---|
| Screw diameter | 120 mm |
| L/D ratio | 33:1 |
| Main motor power | 160 kW |
| Pipe diameter range | 315 to 630 mm |
| Line speed | 0.2 to 3.0 m/min |
| Capacity | 400 to 700 kg/h |
| Installed power | approx. 280 kW |
Клас тиску задається за допомогою класу PE, SDR (стандартного співвідношення розмірів) та температури експлуатації. Для PE100, SDR11, як правило, служить PN16 при 20 градусах Цельсія, SDR17 служить PN10, а SDR26 служить PN6. На промислових об'єктах слід вибрати SDR, який забезпечує необхідний запас тиску при робочій температурі, і перевірити концентрацію середовища за таблицею опору матеріалу.
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 |
| Process wastewater, plant header | 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. Приклади застосування and End Products
Faygo лінія екструзії трубs 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.
- Mining: tailings slurry pipe and process water lines, where low friction bore and abrasion resistance extend service life.
- Agriculture and garden irrigation: PE drip and sprinkler pipe systems that double as mild fertilizer solution lines, benefiting from HDPE corrosion freedom.
- Municipal engineering:великий діаметр труби HDPE для газу та води, одна і та ж платформа, адаптована для нехімічної, але критичної за тиском роботи.
16. Service and Support
Faygo, a Wanplas factory, supports every anti corrosion HDPE chemical лінія екструзії труб 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.
Часті запитання
Why is HDPE preferred over PVC or steel for acid and alkali medium pipelines?
HDPE resists a broad range of dilute acids, alkalis and saline solutions without corrosion, and it does not require internal lining or cathodic protection. PVC is cheaper but limited in temperature and impact toughness, while steel needs continuous anti corrosion lining and suffers pitting in chloride media. HDPE also welds into a fully homogeneous, leak free joint through butt fusion.
What extruder type is used for HDPE chemical pipe, single screw or twin screw?
Труба HDPE звичайно виробляється на високошвидкісному одношнековому екструдері, оснащеному насосом з дозатором типу шестерні для стабільного, без пульсаційного подавання розплаву. Двошнекові екструдери використовуються для компаундування порошку ПВХ і жорсткої труби ПВХ, оскільки ПВХ руйнується без сильного перемішування і деволатилізації. Для HDPE комбінація одношнекового екструдера і насосу з дозатором типу шестерні забезпечує найкращу стабільність виходу і контроль товщини стінки.
How is pipe diameter and wall thickness controlled during extrusion?
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. Laser diameter gauges 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.
Which pressure class should be selected for a chemical transport pipeline?
Faygo — це завод Wanplas, який спеціалізується на лініях екструзії пластикових труб і профілів, з 22-річним досвідом роботи в цій категорії. Faygo управляє трьома спеціалізованими заводами, включаючи FAYGOPLAST, який зосереджується на лініях екструзії труб, профілів та листового матеріалу на території площею 26 650 квадратних метрів в місті Чжанджаіган, лише за два години від аеропорту Шанхаю. Завод має 13 національних патентів, з яких 8 є патентами на винахід, і всі продукти сертифіковані за CE та ISO. Як частина бренду Wanplas, Faygo ділить стандарти якості групи та її місію «Забезпечити теплі клієнти з пластиковою технікою в Китаї», поставляючи лінії труб для відведення та управління водою для будівельних, комунально-інженерних, сільськогосподарських ірригаційних та комунікаційних проектів через мережу, яка охоплює більше 100 експортних регіонів.
What welding methods are recommended for HDPE chemical pipe?
Сплав з'єднань є стандартом для з'єднань труб між собою в діаметрах, що перевищують приблизно 63 міліметри, і створює з'єднання, яке є таким ж міцним, як і сама труба. Куплі для з'єднань використовуються для ремонтів, підключення та обмежених просторів, а адаптери з фланцем з'єднують труби HDPE з клапанами і насосами. Квадратні, чисті кінці труб є необхідними для повноцінних з'єднань за технологією сплаву з'єднань.
What quality tests are performed before an HDPE pipe line ships?
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.
Висновок
An anti corrosion HDPE chemical лінія екструзії труб 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.
