HDPE Pressure Drain Pipe

HDPE Pressure Drain Pipe are manufactured via a single-stage extrusion process using high-density polyethylene (HDPE) resin, resulting in a uniform, dense wall structure; they are classified as flexible plastic drainage pipes. Characterized by high ring stiffness, smooth inner walls, and resistance to ground settlement, these pipes are primarily used in gravity-flow drainage projects—such as municipal stormwater and sewage systems, residential sewage networks, tunnel drainage, and industrial site rainwater collection—serving as an alternative to concrete or cast-iron pipes. Production complies with national or international standards; the products are ISO-certified, and both test reports and samples are available upon request.

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Product Overview

Key Product Advantages

Smooth inner wall and high drainage capacity: Low wall roughness and minimal fluid resistance prevent sediment buildup; the flow rate exceeds that of concrete pipes of the same diameter.
High flexibility and resistance to ground settlement: Excellent toughness allows the pipe to adapt to uneven ground settlement and withstand seismic activity without breaking or cracking.
Corrosion resistance and long service life: Resistant to acids, alkalis, sewage, and soil corrosion; does not rust, with a buried service life of up to 50 years.
Excellent sealing and leak-proof performance: Compatible with butt-fusion welding or flexible gasketed socket connections; reliable joints prevent sewage leakage and subsequent soil or groundwater contamination.
Lightweight and efficient installation: Lighter than concrete pipes, making transportation and pipe laying easier; reduces the need for heavy machinery and shortens construction time.
Impact and low-temperature resistance: Retains good toughness in cold environments, minimizing the risk of brittle fracture during winter construction.

Product Specifications & Parameters

Common Specifications and Parameters

Nominal outer diameter(dn)	Nominal wall thickness en/mm
	SDR41	SDR33	SDR26	SDR21	SDR17	SDR13.6	SDR11	SDR9
	PE100 grade nominal pressure (MPa)
	0.4MPa	0.5MPa	0.6MPa	0.8MPa	1.0MPa	1.25MPa	1.6MPa	2.0MPa
	mm	mm	mm	mm	mm	mm	mm	mm
20	-	-	-	-	-	-	2.3	2.3
25	-	-	-	-	-	2.3	2.3	3.0
32	-	-	-	-	2.3	2.4	3.0	3.6
40	-	-	-	2.3	2.4	3.0	3.7	4.5
50	-	-	2.3	2.4	3.0	3.7	4.6	5.6
63	-	-	2.5	3.0	3.8	4.7	5.8	7.1
75	-	-	2.9	3.6	4.5	5.6	6.8	8.4
90	-	-	3.5	4.3	5.4	6.7	8.2	10.1
110	-	-	4.2	5.3	6.6	8.1	10.0	12.3
125	-	-	4.8	6.0	7.4	9.2	11.4	14.0
140	-	-	5.4	6.7	8.3	10.3	12.7	15.7
160	-	-	6.2	7.7	9.5	11.8	14.6	17.9
180	-	-	6.9	8.6	10.7	13.3	16.4	20.1
200	-	-	7.7	9.6	11.9	14.7	18.2	22.4
225	-	-	8.6	10.8	13.4	16.6	20.5	25.2
250	-	-	9.6	11.9	14.8	18.4	22.7	27.9
280	-	-	10.7	13.4	16.6	20.6	25.4	31.3
315	7.7	9.7	12.1	15.0	18.7	23.2	28.6	35.2
355	8.7	10.9	13.6	16.9	21.1	26.1	32.2	39.7
400	9.8	12.3	15.3	19.1	23.7	29.4	36.3	44.7
450	11.0	13.8	17.2	21.5	26.7	33.1	40.9	50.3
500	12.3	15.3	19.1	23.9	29.7	36.8	45.4	55.8
560	13.7	17.2	21.4	26.7	33.2	41.2	50.8	62.5
630	15.4	19.3	24.1	30.0	37.4	46.3	57.2	70.3
710	17.4	21.8	27.2	33.9	42.1	52.2	64.5	79.3
800	19.6	24.5	30.6	38.1	47.4	58.8	72.6	89.3
900	22.0	27.6	34.4	42.9	53.3	66.2	81.7	-
1000	24.5	30.6	38.2	47.7	59.3	72.5	90.2	-
1200	29.4	36.7	45.9	57.2	67.9	88.2	-	-

Ring stiffness classes: SN4, SN8, SN10, SN12.5, SN16 (selected based on burial depth and pavement load)

Standard length: 6 meters/piece; custom lengths available upon request

Compatible fittings: Elbows, tees, reducers, flanges, inspection chamber connectors, etc.

Standards: GB/T 19472.2; manufacturing to export standards is also available

Applicable Standards

Applications

Municipal gravity-flow drainage networks for stormwater and sewage
Separate stormwater and sewage drainage systems for residential and commercial areas
Collection and discharge of sewage and stormwater in industrial parks and factory complexes
Seepage and drainage systems for tunnels, underground parking garages, and road subgrades
Agricultural water conservancy and wetland drainage projects
Renovation of existing pipe networks; trenchless pipeline rehabilitation and replacement