News Details

1、 Technical analysis: Efficient conveying design under 75PSI pressure

In the field of industrial material transportation, a working pressure of 75 PSI (approximately 5.17 bar) is a key parameter for dry powder conveying systems, requiring a balance between wear resistance, sealing, and gas dynamic efficiency. This heavy-duty conveying pipe achieves efficient transportation of dry materials and grinding slurry through material optimization and structural innovation.

 

（1） Pressure bearing and sealing technology

Pressure resistant design of pipe body

Multi layer composite structure: The conveying pipe adopts a three-layer structure of "inner lining layer+reinforcement layer+outer protective layer". The inner lining layer is made of ultra-high molecular weight polyethylene (UHMWPE), with a Shore hardness of D65-70, a tensile strength of ≥ 45MPa, and can withstand a continuous pressure of 75PSI; The reinforcement layer is a high-strength polyester fiber woven mesh (with a warp and weft density of ≥ 12 × 12 strands/cm), with a burst pressure resistance of 300 PSI; The outer protective layer is made of wear-resistant polyurethane (PU), with a thickness of ≥ 3mm and an impact strength of ≥ 80kJ/m ².

Pressure fluctuation tolerance: In the pulse pressure test (pressure fluctuation range ± 15PSI, frequency 1Hz), the delivery pipe runs continuously for 100000 times without leakage, and its lifespan is four times longer than that of a single-layer structure.

Sealing and Connection Technology

Quick connector design: Adopting a clamp type quick connector, the sealing ring is made of fluororubber (FKM), with a temperature resistance range of -40 ℃ to 200 ℃, and a leakage rate of ≤ 0.01mL/min under a pressure of 75PSI. For example, the replacement time for pipeline joints in a cement plant has been reduced from 30 minutes for traditional flange connections to 5 minutes.

Dynamic sealing compensation: The joint is equipped with a built-in spring compensation device, which can automatically adapt to the thermal expansion and contraction of the pipe body (when the temperature changes by ± 50 ℃, the sealing gap changes by ≤ 0.1mm), avoiding pressure leakage.

（2） Wear resistance and corrosion resistance performance

Wear resistant technology for inner lining layer

UHMWPE lining: The friction coefficient is as low as 0.05, and the wear resistance is 10 times higher than ordinary PE. In the DIN 53516 wear test, when conveying materials containing 20% quartz sand, the wear rate of the lining is ≤ 0.03mm/1000 hours.

Ceramic particle composite: For grinding mud conditions, the inner lining layer can be embedded with alumina ceramic particles (particle size 50-100 μ m), with a hardness of HRA88 and an extended wear life of over 2000 hours.

Corrosion resistance and anti-static

Inner lining modification: Add nano zinc oxide (ZnO) and conductive carbon black, with a surface resistance of ≤ 10 ⁶ Ω, to avoid static electricity accumulation and explosion; Simultaneously enhancing chemical corrosion resistance, the mass loss rate is ≤ 0.5% after soaking in a medium with pH 2-12 for 72 hours.

Protection of outer protective layer: the PU outer protective layer is added with ultraviolet absorber and antioxidant, the weather resistance reaches 2000 hours of ISO 4892 standard, and the anti-aging performance is improved by 50%.

2、 Application scenarios and typical cases

75PSI heavy-duty dry powder conveying pipes are widely used in industries such as building materials, chemicals, and mining to meet the transportation needs of different materials.

 

（1） Building materials industry: cement and fly ash transportation

Application scenarios

The dry powder conveying from the kiln tail to the top of the warehouse in the cement plant has a pressure of 75PSI, a flow rate of 50-100t/h, and a conveying distance of ≤ 300m.

The pneumatic conveying system for fly ash should avoid material agglomeration and pipeline blockage.

classic case

A certain cement group uses a 200mm diameter conveying pipe with an inner lining of UHMWPE+ceramic particle composite. When conveying cement containing 5% free lime, it runs continuously for 18 months without wear and leakage, which is 6 times longer than the service life of traditional steel pipes.

A certain power plant fly ash project: The outer protective layer of the conveying pipe is made of flame-retardant PU (oxygen index ≥ 32%), which has passed UL94 V-0 certification to avoid the risk of coal powder spontaneous combustion.

（2） Chemical industry: Grinding slurry and catalyst transportation

Application scenarios

Transport titanium dioxide grinding slurry, pressure 75PSI, solid content 40% -60%, particle size ≤ 5 μ m.

The pneumatic conveying of catalyst particles (such as molecular sieves) should avoid particle breakage and pipeline corrosion.

classic case

A certain titanium dioxide factory: The inner lining of the conveying pipe is made of ceramic particle reinforced UHMWPE. When conveying slurry with a solid content of 50%, the flow rate reaches 15m/s, the pressure loss is ≤ 0.5bar/100m, and the energy consumption is reduced by 20%.

A certain refinery catalyst project: The conveying pipe adopts anti-static design, with a surface resistance of ≤ 10 ⁶ Ω, to avoid catalyst dust explosion and improve system safety by 90%.

（3） Mining industry: tailings and concentrate transportation

Application scenarios

Iron ore tailings dry discharge system, pressure 75PSI, solid content 30% -40%, conveying distance ≥ 500m.

The pneumatic conveying of gold ore concentrate should avoid the deposition of precious metal particles.

classic case

A certain iron ore tailings project: The diameter of the conveying pipe is 150mm, the wear-resistant life of the inner lining layer is 2500 hours, and the annual maintenance cost is reduced by 70%.

A certain gold mine concentrate project: The conveying pipe adopts a low flow resistance design (roughness ≤ 0.05mm), and the concentrate recovery rate is increased to 99.5%, with an annual economic benefit increase of 5 million yuan.

3、 Industry Trends and Product Upgrade Directions

（1） Technological development trends

Ultra high pressure and long-distance transportation

Industrial demand drives the development of conveying pressure towards 100-150PSI, requiring the use of carbon fiber reinforced composite materials. For example, a carbon fiber resin composite pipe developed by a certain laboratory has a working pressure of 120 PSI and a weight reduction of 40% compared to traditional pipes.

Long distance transportation (≥ 1000m) requires optimization of pipe flow resistance and pressure compensation technology. For example, a certain enterprise achieved a 15% reduction in energy consumption by implementing segmented pressurization design to transport concentrate over a distance of 1500m.

Intelligent and predictive maintenance

Integrate pressure, flow, and wear sensors to monitor the status of the pipe in real-time. For example, a certain intelligent conveyor pipe predicts its remaining lifespan through AI algorithms and provides a 30 day early warning of replacement needs to avoid unplanned downtime.

RFID chips achieve full lifecycle traceability and can be monitored throughout the entire process from production to disposal.

Environmental Protection and Sustainability

Biobased materials (such as PLA) and recyclable reinforcement layers can recover 90% of the raw materials through pyrolysis after disposal.

Low VOC outer protective layer, compliant with EU REACH regulations, reducing environmental pollution.

（2） Changes in market demand

Driven by the new energy and new materials industry

The transportation of positive electrode materials for lithium batteries (such as lithium iron phosphate) should avoid metal contamination, and the inner lining of the transportation pipe should be made of non-metallic materials (such as ceramics).

The hydrogen storage and transportation system has higher requirements for pipeline pressure resistance and sealing, and the 75PSI transmission pipe needs to pass ASME B31.12 hydrogen pipeline certification.

Globalization and Localization Services

Multinational corporations require suppliers to have global supply capabilities and localized services. For example, an international mining group requires suppliers to respond to overseas after-sales needs within 72 hours and provide on-site installation guidance.

（3） Product upgrade strategy

Differentiated product positioning

Small and medium-sized manufacturers focus on segmented markets. For example, a certain enterprise specializes in mining wear-resistant conveying pipes and occupies 30% of the mid to low end market share through the combination of "ceramic lining+carbon fiber reinforcement".

Large manufacturers monopolize the high-end market through technology, such as an international brand's carbon fiber conveyor pipe, which is 60% more expensive than similar products, but has strong customer stickiness.

Service oriented transformation

Provide a one-stop solution for "conveying pipe assembly+installation tools+training". For example, a certain manufacturer customized installation fixtures for conveying pipes in a cement plant, which increased assembly efficiency by 50%.

Carry out the "trade in" business, recycle old pipes and remanufacture them to achieve 85% performance of new products, reducing costs by 35%.

Globalization Layout and Compliance

Establish production bases in resource rich regions such as Southeast Asia and Africa to avoid trade barriers. For example, a domestic manufacturer has established a factory in Indonesia, with products radiating to the ASEAN and Australian markets, resulting in a 20% reduction in tariff costs.

Through ISO 14001 environmental management system certification and ISO 45001 occupational health and safety management system certification, it meets international ESG requirements.

In the future, 75PSI heavy-duty dry powder conveying pipes need to continuously iterate technology to adapt to Industry 4.0 and green manufacturing trends. Manufacturers need to strengthen cooperation with end users, deeply participate in the design of material transfer systems, and build technological barriers and cost advantages through material innovation and process optimization, in order to take the initiative in global competition. For example, developing self-healing inner lining layers (such as microcapsule encapsulated repair agents), modular rapid replacement systems, etc., to further enhance product competitiveness.