On the other hand, Double Wall Corrugated Pipe Fittings are specially engineered for drainage and sewage systems, providing superior structural strength and long-term performance. The double-wall design ensures excellent resistance to external loads, making them suitable for underground applications. Compared to traditional materials, HDPE Pipe Fittings offer ease of installation and a longer lifespan, while Double Wall Corrugated Pipe Fittings are highly effective in managing large volumes of wastewater and stormwater.

Moreover, the lightweight nature of HDPE Pipe Fittings simplifies transportation and reduces installation costs, whereas the efficient joint system of Double Wall Corrugated Pipe Fittings ensures a leak-proof connection even under challenging conditions. Both HDPE Pipe Fittings and Double Wall Corrugated Pipe Fittings have become indispensable in industries such as agriculture, municipal engineering, and construction, addressing the growing demand for reliable and sustainable piping solutions.

Outer Diameter	SDR 9	SDR 11	SDR 13.6	SDR 17	SDR21	SDR26
DN (mm)	PN20	PN16	PN12.5	PN10	PN8	PN6
	Wall Thick Ness(mm)
20	2.3	2.3
25	3	2.3	2.3
32	3.6	3	2.4
40	4.5	3.7	3	2.4
50	5.6	4.6	3.7	3
63	7.1	5.8	4.7	3.8
75	8.4	6.8	5.6	4.5
90	10.1	8.2	6.7	5.4	4.3
110	12.3	10	8.1	6.6	5.3	4.2
125	14	11.4	9.2	7.4	6	4.8
140	15.7	12.7	10.3	8.3	6.7	5.4
160	17.9	14.6	11.8	9.5	7.7	6.2
180	20.1	16.4	13.3	10.7	8.6	6.9
200	22.4	18.2	14.7	11.9	9.6	7.7
225	25.2	20.5	16.6	13.4	10.8	8.6
250	27.9	22.7	18.4	14.8	11.9	9.6
280	31.3	25.4	20.6	16.6	13.4	10.7
315	35.2	28.6	23.2	18.7	15	12.1
355	39.7	32.2	26.1	21.1	16.9	13.6
400	44.7	36.3	29.4	23.7	19.1	15.3
450	50.3	40.9	33.1	26.7	21.5	17.2
500	55.8	45.4	36.8	29.7	23.9	19.1
560	62.5	50.8	41.2	33.2	26.7	21.4
630	70.3	57.2	46.3	37.4	30	24.1
710		64.5	52.2	42.1	33.9	27.2
800		72.7	58.8	47.4	38.1	30.6
900		81.8	66.2	53.3	42.9	34.4
1000		90.2	72.5	59.3	47.7	38.2
1200			88.2	67.9	57.2	45.9
1400			102.9	82.4	66.7	53.5
1500			110.2	88.2	71.4	57.6
1600			117.6	94.1	76.2	61.2

Ⅰ. Classification of corrugated pipe fittings

According to their functions and uses, corrugated pipe fittings can be divided into the following types

1. Connecting fittings

Straight-through connection: connects two sections of bellows directly together, usually used to extend bellows of the same diameter.

Reducing joint: used to connect bellows of different diameters.

Flexible connector: provides a certain displacement compensation capability, suitable for pipeline systems in complex environments.

2. Direction-changing fittings

Elbow: used to adjust the direction of the pipeline, such as 45° elbow, 90° elbow, etc.

Tee/cross: used for diversion or confluence between multiple bellows.

3. Fixing and sealing accessories

Flange: used for high-strength or detachable connections, generally used in large bellows systems.

Sealing ring: used with fittings to ensure the air tightness and water tightness of the interface.

End cap: Close the end of the bellows to prevent dust or foreign matter from entering.

4. Special purpose accessories

Compensator: Allows the pipeline to move or expand when the temperature difference changes or the geological changes.

Diverter: Divert or collect fluids in complex pipeline systems.

Ⅱ. Main materials of corrugated pipe fittings

1. Plastic materials

Polyethylene (PE): High flexibility and corrosion resistance, widely used in drainage, irrigation and sewage treatment.

Polypropylene (PP): High temperature resistance, chemical corrosion resistance, suitable for industrial wastewater and high temperature environment.

Polyvinyl chloride (PVC): Cost-effective, easy to process, suitable for medium and low pressure drainage and protection of pipelines.

Engineering plastics (such as PA or POM): Used in high-demand industrial scenarios.

2. Metal materials

Stainless steel: High strength, corrosion resistance, suitable for high pressure and high temperature environment.

Aluminum alloy: light weight, corrosion resistant, suitable for special mechanical piping systems.

3. Composite materials

Combination of plastic and metal to improve the pressure resistance and sealing performance of pipe fittings.

III. Advantages of corrugated pipe fittings

1. Strong flexibility: can easily adapt to complex terrain and curved pipe systems.

2. Good corrosion resistance: suitable for conveying chemical liquids, sewage, mud, etc.

3. Convenient construction: simple installation and disassembly, reducing construction time and labor costs.

4. High durability: wear-resistant, not easy to age, suitable for long-term use.

5. Environmental protection: some materials can be recycled to reduce environmental pollution.

IV. Application areas of corrugated pipe fittings

1. Municipal engineering

Drainage and sewage pipe systems.

Rainwater collection pipes.

2. Agricultural irrigation

Flexible pipe connections in field drip irrigation and sprinkler irrigation systems

3. Construction engineering

Underground drainage system and foundation waterproofing system.

4. Industrial field

Liquid and gas transportation in chemical pipeline system.

Wastewater treatment network in factory.

5. Ventilation and cable protection

Ventilation ducts to protect cables from external environment.

V. Installation and maintenance of corrugated pipe fittings

1. Installation points

Interface cleaning: Before installation, make sure the interface between the pipe fittings and the corrugated pipe is clean and dry.

Use seals correctly: Choose appropriate seals to avoid water or air leakage at the interface.

Fix firmly: Use pipe clamps or brackets to fix the corrugated pipe to prevent displacement or falling off during use.

Prevent excessive bending: When the pipe turns, the bending radius must not be less than the specified value of the pipe diameter.

2. Maintenance suggestions

Regular inspection: Check whether there is leakage, looseness, etc. at the connection of the pipe fittings.

Clean up in time: Prevent debris from clogging the pipeline or affecting the sealing performance.

Repair or replace: If aging or damaged pipe fittings are found, they should be replaced or repaired in time.

VI. FAQ

1. Are corrugated pipe fittings prone to leakage?

If corrugated pipe fittings are made of suitable materials and installed correctly, the possibility of leakage is extremely low. The quality and installation method of the sealing ring play a decisive role in the sealing effect.

2. How long is the service life of corrugated pipe fittings?

The service life depends on the material, use environment and maintenance. High-quality plastic corrugated pipe fittings can be used for 10-20 years, and the life of stainless steel corrugated pipe fittings can reach more than 50 years.

3. How to choose suitable corrugated pipe fittings?

Select corrosion-resistant materials according to the conveying medium (such as water, gas, chemical liquids, etc.).

Select the appropriate pipe fitting strength according to the working pressure and temperature.

Make sure the pipe fitting size matches the pipeline.