PPH/HDPE Equipment

The PPH and HDPE spiral-wound storage tanks are mainly made of polypropylene and high-density polyethylene plastic materials through extrusion winding without weld seams technology. They are used for various specifications of tank bodies, tank bodies, various towers and pipelines. The products are used for storing various liquids and various liquid reaction carriers. Especially, they have the best application effect in storing liquids with corrosive and hazardous properties.It has a service life of over 10 years under harsh conditions and low maintenance costs.

  • PPH (Polypropylene)
  • HDPE (High-density Polyethylene)
  • The correct materials in the anti-corrosion system
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    Details

    During the production process, the products are completely made from the same material from the main body to the accessories. They also have the characteristics of no leakage and weldability. Their prices are much lower than those of stainless steel products. Under natural conditions, their service life is longer. The products enjoy excellent reputation in various fields. The PPH and HDPE spiral-wound storage tanks are mainly made of polypropylene and high-density polyethylene plastic materials through extrusion winding without weld seams technology. They are used for various specifications of tank bodies, tank bodies, various towers and pipelines. The products are used for storing various liquids and various liquid reaction carriers. Especially, they have the best application effect in storing liquids with corrosive and hazardous properties. In the production process, the products are completely made from the same material from the main body to the accessories. They also have the characteristics of no leakage and weldability. Their prices are much lower than those of stainless steel products.

    Product Information

    Materials
    • PPH (Polypropylene)
    • HDPE (High-density Polyethylene)
    • The correct materials in the anti-corrosion system
    Operating Conditions
    • For static use (i.e., fixed position), it cannot be used as a transport tank.
    • Working Pressure: -2000 Pa to +3000 Pa (atmospheric pressure).
    • Working Temperature: The softening temperature of PPH is 150℃, and it can be safely and long-term used at 100℃.
    • The operating temperature range is -20℃ to 100℃.
    • The softening temperature of HDPE is 100℃, and it can be safely and long-term used at 60℃.
    • The operating temperature range is -30℃ to 60℃.
    • Filling Coefficient: 0.8 to 0.85.
    •  
    Equipment Dimensions
    • Volume (m3): ≤ 100
    • Equipment diameter (mm): φ1000, φ1200, φ1400, φ1600, φ1800, φ2000, φ2200, φ2500, 2800, φ3000, φ3200, φ3500, φ3900, φ4200
    • One-time molding height of the equipment (mm): 630
    •  
    Durability

    It has a high creep resistance strength (long-term static hydraulic strength). Creep: The phenomenon where the deformation of a material increases with the extension of time under constant temperature and pressure. Correct usage can last for over 30 years, and it can also ensure a duration of more than 10 years under harsh conditions.

    Welding
    • The barrel body is processed by the advanced spiral winding and integral one-time stacking molding technology;
    • It can be freely designed with a gradient (thinner at the top and thicker at the bottom);
    • The bottom and top of the tank are processed by the dedicated automatic welding equipment.
    • With the same material, multiple welding methods can be used, and the joint coefficient can reach above 0.9, with the welding strength basically the same as the base material strength.
    Corrosion Resistance (Chemical Resistance)

    PPH/HDPE is a non-polar plastic with stable chemical stability. Apart from strong oxidizing acids (incinerated sulfuric acid, concentrated nitric acid) and organic compounds that soften or swell it, most chemical media can be stored. At the same time, it increases UV resistance by adding UV inhibitors to enhance the UV protection performance.

    Media Concentration Temperature (°C) Media Concentration Temperature (°C)
    HDPE PPH HDPE PPH
     H₂S O₄ 80% 50 100 HClO Any 50 20
    85% 50 60 H₂CrO₄ (CrO₃ <250g 20  
    98% 20   H₃BO Any 50 100
    HNO₃ 10% 50 60 H₃A sO₄ Any 50 60
    65% 20 20 HASOz Any 20 20
    HNO₂ 10% 20 20 H₂SiO₃,H₄SiO₄,H₂SiO s Any 50 60
    Hydrochloric acid Any 50 100 HBF₄ Aqueous solution 50 60
    Fluoronitric acid   50 100 H₂S iF6 Any 50 100
    H₃P O₄ Any 50 100 HF 85% 50  
    H₄P₂O₇ 104% 50   30% 50 60
    H₃PO₃ Any 20 20 Hydrofluoric acid mist Any 50 100
    HCIO₄ 50% 20   HCN Any 50 60
    20% 50 20 HBr 50% 20 60
    NH₄OH Any 50 60 Mg(OH)2  Ba(OH)2 Any 50 100
    NaOH Any 50 100 Ca(OH)₂ Any 50 60
    KOH Any 50 100 Fe(OH)   AI(OH)31 Any 50 100
    Na₂CO₃ Any 50 100 Cr₇ (SO₄)3 10% 20  
    K₂CO₃ Any 50 100 CuSO₄ Any 50 100
    KHCO₃ Any 50 100 PbSO₄ Any 50 100
    CoSO4 Any 50 100 NiSO4 Any 50 100
    CaCO₃ Any 50 100 KAl(SO₄)₂ Any 50 100
    NaNO₃ Any 50 100 NaHSO₄ Any 50 60
    Ca(NO₃)₂ Any 50 100 (NH₄)₂SO₃ Any 50 60
    Cu(NO₃); Any 50 100 NaHSO₃ Any 50 60
    AgNO₃ Any 50 60 Na₂S₂O₃ Any 50 60
    NaNO₂ Any 50 60 (NH₄)₃PO₄ Any 50 100
    KCIO₃ Any 50 60 K₃PO₄ Any 50 100
    Ca(ClO₃)₂ Any 20 60 Sodium polyphosphate Any 20 20
    NaClO₂ 50% 20 20 Na₂CrO₄ 40% 50 60
    NaClO 13% 20 20 K₃BO₃ 1% 50 60
    Media Concentration Temperature (°C) Media Concentration Temperature (°C)
    HDPE PPH HDPE PPH
    HCOOH 85% 50 60 Aromatic acids Aqueous solution 50 60
    10% 50 100 R·COOH 100% 20 60
    CH₃COOH 100% 20 20 CH₃ (CH₂)₇CH CH(CH₂)₇COOH 100% 20 60
    70% 50 100 (HOOCCH₂)₂COHCOOH Any 50 100
    HOOC(CH₂)₂COOH 50% 20 60 CHCI2COOH 50% 50 60
    CH₃COOK Any 50 20 CH₂OH(CHOH)₄COONa Any 50 60
    (CH₂COO)₂ Any 50 100 Na₃C₆H₅O₇ Any 50 60
    NaOOC(CH₂)₂CHNH₂COOH Any 50 60 Alginate 100% 50 100
    CH₃OH Any 50 60 CH₂ (CH₂)sOH 100% 50 20
    C₂H₅OH 96% 50 100 Hexanediol 100% 50 20
    HCHO 44% 50 60 C₄H₃OCHO 100% 20  
    CH₃CHO 40% 20 60 OHCCHO Aqueous solution 20 20
    CH₃CO CH₃ Any 20 60 CH₃COCH(CH₃)₂ 100% 20 20
    C₆H₅OCH₃ 100%   20 HOCH₂CH₂OCH₃ 100% 20 20
    CH₃COOC₂Hs Dilute 20 20 C₆H₄ (OH)COOCH₃ 100% 20 20
    CH₃COCH₂COOC₂Hs 100% 50   (C₄HgO)₃PO 100% 20 20
    C₂H₅NH₂ Dilute 20 100 Quaternary ammonium 100% 50 100
    HCON(CH₃)₂ 100% 50 60 C₆H₅N H₂ Saturated solution 50 60
    CH₃COONH₄ Any 50 100 (NH₂OH)₂H₂SO₄ 12% 50 60
    C₆H₅OH Aqueous solution 20 20 Creosote (wood tar) 100% 20 20
    Benzonitrile   50 100 C₁0H₁₆O 100% 20 20
    C₆H₅CH₂Cl 100% 20 20 Lauroyl chloride 100% 20  
    CICH₂CHOHCH₂OH 100% 20 20 Cyanogen chloride   50 100
    Benzyl chloride   50 60 C₁gH₁₄N₂ Aqueous solution 20 20
    Naphtha   20 20 CO(NH₂) Any 50 60
    CH₂=CHCN Diluted 50 20 Food    50  

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    Application Fields

    Pharmaceutical industry

    Preparation of pharmaceutical intermediates and active pharmaceutical ingredients, extraction of traditional Chinese medicine substances, etc.

    Fine Chemical Industry

    Chemical intermediates for the chemical and pesticide industries, extraction of raw materials for flavors, cosmetics and other products, and organic solvents such as DMF and DMAC…

    Petroleum industry

    Lubricating oil extraction and refining, diesel desulfurization, etc.

    Food industry

    Extraction and separation of lactic acid and citric acid fermentation broth, extraction of edible oil and food colorants, etc.

    Hydrometallurgy

    Extraction and separation of copper, vanadium, nickel, cobalt, zinc, rubidium and rare earth elements, extraction of boron and lithium from salt lakes

    Environmental protection industry

    Treatment of phenolic-containing wastewater, waste acid treatment, printing and dyeing wastewater (such as H acid, T acid, etc.), DMF wastewater, naphthalene sulfonic acid wastewater, etc.

    Oil-water separation

    Separation of some organic solvents from water

    Application Case

    FAQ

    A:

    Suggenstion for choosing:

    Suitable scenarios for PPH:storage tanks/mixing tanks with strongly corrosive media,with the temperature not exceeding 100℃.

    Properties

    PPH

    Temperature resistance range:

    -20°C ~ 110°C

    Chemical resistance

    Strong acids (e.g., concentrated sulfuric acid, hydrochloric acid), strong alkalis

    Impact resistance

    Low(brittle at low temperatures)

    Rigidity

    HIGH(suitable for pressure-bearing structures)

    Welding process

    Hot-melt butt welding (requires special welding machine)

    A:Corrosion ResistancePPH):

    Resistant Media:concentrated sulferic acid(≤60%)、Hydrochloric acid(≤37%)、sodium hydroxide(≤50%)、Brine water.

    Non-resistant Media:Concentrated nitric acid (>50%)、Chlorosulfonic acid、Organic solvents (causes swelling.

    A:Limit condition:

    Temperature Impace:Exceeding the material’s temperature resistance limit accelerates corrosion and deformation (e.g., PPH softens above 110°C).

    A:Welding solution:

    Hot-melt butt welding: Using special welding machines (temperature controlled at 220°C~240°C), requiring bevel alignment and uniform pressure.

    Testing Standards: Weld strength ≥90% of base material, inspected via X-ray or ultrasonic testing.

    A:(PPh) pressure bearing range:Maximum working pressure at room temperature ≤1.6 MPa (PN16); thick-walled design can increase it to 2.5 MPa.

    Solution for high-pressure scenarios:Metal reinforcement: PPH storage tanks are externally wrapped with stainless steel hoops or carbon fiber belts to enhance compressive capacity.

    PPH tanks belong to atmospheric pressure equipment.

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