{"id":458,"date":"2025-10-14T11:31:58","date_gmt":"2025-10-14T03:31:58","guid":{"rendered":"https:\/\/www.sancaipipes.com\/product\/%e8%81%9a%e4%b9%99%e7%83%afhdpe%e7%bc%a0%e7%bb%95%e7%bb%93%e6%9e%84%e5%a3%81a%e5%9e%8b%e7%ae%a1%e6%9d%90%e5%8f%8a%e9%85%8d%e4%bb%b6g%e7%99%bd%e8%89%b2%e7%b3%bb%e5%88%97\/"},"modified":"2025-12-17T10:02:13","modified_gmt":"2025-12-17T02:02:13","slug":"%e8%81%9a%e4%b9%99%e7%83%afhdpe%e7%bc%a0%e7%bb%95%e7%bb%93%e6%9e%84%e5%a3%81a%e5%9e%8b%e7%ae%a1%e6%9d%90%e5%8f%8a%e9%85%8d%e4%bb%b6g%e7%99%bd%e8%89%b2%e7%b3%bb%e5%88%97","status":"publish","type":"product","link":"https:\/\/www.sancaipipes.com\/ru\/products\/municipal\/municipal-sewerage-and-wastewater-system\/%e8%81%9a%e4%b9%99%e7%83%afhdpe%e7%bc%a0%e7%bb%95%e7%bb%93%e6%9e%84%e5%a3%81a%e5%9e%8b%e7%ae%a1%e6%9d%90%e5%8f%8a%e9%85%8d%e4%bb%b6g%e7%99%bd%e8%89%b2%e7%b3%bb%e5%88%97\/","title":{"rendered":"HDPE winding structure wall (A) type pipe"},"content":{"rendered":"
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1.Product Introduction<\/b><\/strong><\/span><\/h3>

The HDPE Spirally Wound Structural Wall (Type A) Pipe, commonly referred to as Spiral Wound Type A Pipe or hollow-wall spirally wound pipe, is a type of structural wall pipe manufactured primarily from high-density polyethylene (HDPE) using a hot winding forming process.<\/p>

Its pipe wall features a unique hollow I-shaped structure, a design grounded in mechanical principles that significantly enhances the pipe\u2019s ring stiffness and overall mechanical properties while saving material and reducing weight. As a flexible pipe, it exhibits excellent extensibility, effectively resisting uneven settlement of the foundation and improving the seismic resilience and disaster mitigation capabilities of public infrastructure.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Product Specifications<\/h3>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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2.Technical Parameters<\/b><\/strong><\/span><\/h3>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Parameter Item<\/b><\/strong><\/p><\/td>

Technical Specifications & Description<\/b><\/strong><\/p><\/td><\/tr>

Product Standard<\/p><\/td>

GB\/T 19472.2-2017<\/p><\/td><\/tr>

Diameter Range<\/p><\/td>

Nominal diameter (DN) covers from DN200mm to DN2800mm. Common specifications include DN300, DN400, DN500, DN600, DN800, DN1000, DN1200, DN1500, etc.<\/p><\/td><\/tr>

Ring Stiffness Class<\/p><\/td>

SN6.3 (SN6), SN8, SN10, SN12.5. Some manufacturers can produce SN16 class products.<\/p><\/td><\/tr>

Single Pipe Length<\/p><\/td>

Standard length is typically 6 meters. Production of other lengths is also supported based on agreement between supplier and purchaser.<\/p>

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Main Raw Material<\/p><\/td>

High-Density Polyethylene (HDPE) resin, with possible addition of appropriate amounts of performance-enhancing agents such as inorganic nanoparticles, light stabilizers, etc.<\/p><\/td><\/tr>

\u00a0Applicable Temperature<\/p><\/td>

The temperature of the conveyed medium should not exceed 45\u00b0C for long-term operation.<\/p><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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3.Connection Methods<\/b><\/strong><\/span><\/h3>\n
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  • <\/b>Electrofusion Coupling Strip Connection:<\/b><\/strong>Utilizes electrical heating elements embedded within the strip to generate heat upon electrification, fusing the pipe connection area and the strip into a single unit. This method provides a robust, high-strength joint with excellent sealing performance, suitable for pipes of DN600 and above.<\/li>\n<\/ul>\n
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    • <\/b>Heat-Shrink Sleeve (or Band) Connection:<\/b><\/strong>Involves wrapping the connection area with a specialized heat-shrink sleeve, which is then uniformly heated (e.g., with a torch) to shrink and form a seal. This method offers lower accessory costs, convenient installation, and is not restricted by the availability of on-site electrical power.<\/li>\n<\/ul>\n
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      • <\/b>Socket (Spigot-and-Socket) Connection:<\/b><\/strong>One end of the pipe is a socket (bell), the other a spigot, paired with an elastomeric sealing ring. Installation simply requires inserting the spigot into the socket. This method is characterized by simple, fast operation. As a flexible joint, it offers good seismic performance and is particularly suitable for sites where electrical operations are not advisable.<\/li>\n<\/ul>\n
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        • <\/b>Stainless Steel Clamp Connection:<\/b><\/strong>Employs a stainless steel clamp and a sealing rubber sleeve, forming a connection through mechanical fastening. This method allows for convenient installation and is not affected by environmental conditions.<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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          4.Key Advantages & Selling Points<\/b><\/strong><\/span><\/h3>
          • <\/b>High Strength & High Toughness:<\/b><\/strong>The “I”-beam shaped structural wall design imparts high ring stiffness to the pipe, resulting in excellent compression and impact resistance. As a flexible pipe, it can effectively accommodate minor ground deformations.<\/li><\/ul>
            • <\/b>Corrosion Resistance & Long Service Life:<\/b><\/strong>The HDPE material offers outstanding resistance to chemical corrosion, is not easily degraded by chemicals in wastewater or soil, and has a service life exceeding 50 years.<\/li><\/ul>
              • <\/b>Excellent Hydraulic Properties:<\/b><\/strong>The very smooth inner wall creates low frictional resistance, high flow capacity, and resistance to scaling. For a given diameter, its water conveyance capacity is superior to that of concrete pipes.<\/li><\/ul>
                • <\/b>Reliable, Zero-Leakage Connections:<\/b><\/strong>Multiple available connection methods ensure excellent joint sealing, completely preventing environmental contamination from wastewater leakage.<\/li><\/ul>
                  • <\/b>Lightweight & Rapid Installation:<\/b><\/strong>The pipes are lightweight for easy handling. Installation does not require heavy machinery, which can reduce construction costs and shorten project timelines.<\/li><\/ul>
                    • <\/b>Environmental Sustainability & Cost-Effectiveness:<\/b><\/strong>The product is non-toxic and non-polluting, and is 100% recyclable. Its comprehensive installed cost is often lower than that of traditional concrete pipes.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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                      5.Product Applications<\/b><\/strong><\/span><\/h3>\n
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                      • <\/b>Municipal Engineering:<\/b><\/strong>Urban underground sewer networks, stormwater collection systems, stormwater and sewage diversion retrofit projects.<\/li>\n<\/ul>\n
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                        • Road & Railway Engineering<\/strong>: Seepage and drainage systems for railways and highways.<\/li>\n \t
                        • <\/b>Industrial Applications:<\/b><\/strong>Industrial wastewater discharge for factories; mine ventilation and drainage.<\/li>\n<\/ul>\n
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                          • <\/b>Environmental Engineering:<\/b><\/strong>Leachate collection pipes for landfill sites; wastewater treatment plants.<\/li>\n<\/ul>\n
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                            • <\/b>Construction Projects:<\/b><\/strong>Outdoor drainage for residential complexes; rainwater discharge for large-scale venues.<\/li>\n<\/ul>\n
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                              • <\/b>Other Fields:<\/b><\/strong>Agricultural drainage, water conservancy construction, conduits for power cables, etc.<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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                                6.Testing & Certifications<\/b><\/strong><\/span><\/h3>\n
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                                • <\/b>Testing Standards:<\/b><\/strong>Testing is conducted in accordance with national standards such as GB\/T 19472.2-2017.<\/li>\n<\/ul>\n
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                                  • <\/b>Key Test Items:<\/b><\/strong>These include, but are not limited to, ring stiffness, impact resistance, ring flexibility, oven test, ash content, and density.<\/li>\n<\/ul>\n
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                                    • <\/b>Testing Institutions:<\/b><\/strong>Testing can be commissioned to national or industry-level quality inspection centers possessing CNAS and CMA accreditations.<\/li>\n<\/ul>\n
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                                      • <\/b>Corporate Qualifications:<\/b><\/strong>Manufacturers should typically hold ISO 9001 Quality Management System certification.<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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                                        7.Manufacturing Process Flow<\/b><\/strong><\/span><\/h3>\n
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                                        • <\/b>Raw Material Preparation:<\/b><\/strong>High-density polyethylene (HDPE) resin is used as the primary raw material.<\/li>\n<\/ul>\n
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                                          • <\/b>Profile Extrusion:<\/b><\/strong>The HDPE raw material is heated, plasticized, and extruded through the first extruder into a specifically shaped profile strip.<\/li>\n<\/ul>\n
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                                            • <\/b>Winding and Fusion:<\/b><\/strong>On a winding machine, the profile strip is spirally wound onto a mandrel. Simultaneously, molten HDPE from a second extruder is used to fusion weld the overlapping seams of the wound profile strip, ensuring the quality of the pipe’s welded joints.<\/li>\n<\/ul>\n
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                                              • <\/b>Cooling and Shaping:<\/b><\/strong>The wound pipe is cooled to set its shape.<\/li>\n<\/ul>\n
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                                                • <\/b>Cutting and Inspection:<\/b><\/strong>The pipe is cut to specified lengths and undergoes necessary quality inspections.<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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                                                  8.\u00a0Packaging and Delivery<\/b><\/strong><\/span><\/h3>\n
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                                                  • <\/b>Packaging Method:<\/b><\/strong>The ends of the pipes are protectively packaged to prevent impact damage during transportation and storage.<\/li>\n<\/ul>\n
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                                                    • <\/b>Standard Length:<\/b><\/strong>The standard pipe length is 6 meters per piece.<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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                                                      9. Sales Service<\/b><\/strong><\/span><\/h3>
                                                      • <\/b>Pre-Sales Service:<\/b><\/strong>Provision of professional technical consultation, product selection advice, and engineering solution design support.<\/li><\/ul>
                                                        • <\/b>In-Sales Service:<\/b><\/strong>Provision of detailed product technical documentation. Some manufacturers offer on-site technical guidance during construction to ensure proper installation.<\/li><\/ul>
                                                          • <\/b>After-Sales Service:<\/b><\/strong>A dedicated service hotline is established for promptly addressing customer inquiries. Clear quality warranties are provided for product quality.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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                                                            10. Company Strengths<\/b><\/strong><\/span><\/h3>\n
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                                                            • <\/b>Production Technology:<\/b><\/strong>Possession of advanced production lines and mature spiral winding and fusion welding process technology.<\/li>\n<\/ul>\n
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                                                              • <\/b>R&D and Innovation Capability:<\/b><\/strong>Emphasis on product research & development and technological upgrades, with some enterprises participating in the formulation of industry association standards.<\/li>\n<\/ul>\n
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                                                                • <\/b>Quality Control System:<\/b><\/strong>Implementation of a comprehensive quality management system with strict inspection and control from raw materials to finished products.<\/li>\n \t
                                                                • <\/b>Product Line and Application Cases:<\/b><\/strong>A complete range of product specifications and extensive application cases covering multiple key engineering fields.<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

                                                                  1.Product Introduction The HDPE Spirally Wound Structural Wall (Type A) Pipe, commonly referred to as Spiral Wound Type A Pipe or hollow-wall spirally wound pipe, is a type of structural wall pipe manufactured primarily from high-density polyethylene (HDPE) using a hot winding forming process. Its pipe wall features a unique hollow I-shaped structure, a design […]<\/p>","protected":false},"featured_media":2894,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[15,24,32],"product_tag":[],"class_list":{"0":"post-458","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-all-categories","7":"product_cat-municipal","8":"product_cat-municipal-sewerage-and-wastewater-system","10":"first","11":"instock","12":"shipping-taxable","13":"product-type-simple"},"acf":[],"_links":{"self":[{"href":"https:\/\/www.sancaipipes.com\/ru\/wp-json\/wp\/v2\/product\/458","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sancaipipes.com\/ru\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.sancaipipes.com\/ru\/wp-json\/wp\/v2\/types\/product"}],"version-history":[{"count":87,"href":"https:\/\/www.sancaipipes.com\/ru\/wp-json\/wp\/v2\/product\/458\/revisions"}],"predecessor-version":[{"id":3534,"href":"https:\/\/www.sancaipipes.com\/ru\/wp-json\/wp\/v2\/product\/458\/revisions\/3534"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sancaipipes.com\/ru\/wp-json\/wp\/v2\/media\/2894"}],"wp:attachment":[{"href":"https:\/\/www.sancaipipes.com\/ru\/wp-json\/wp\/v2\/media?parent=458"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.sancaipipes.com\/ru\/wp-json\/wp\/v2\/product_brand?post=458"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.sancaipipes.com\/ru\/wp-json\/wp\/v2\/product_cat?post=458"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.sancaipipes.com\/ru\/wp-json\/wp\/v2\/product_tag?post=458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}