Product features:
1. Corrosion resistance: PE is an inert material, which can resist the corrosion of various chemical media
2. No leakage: PE adopts electric melting edge joint, hot melt butt joint and hot melt socket connection, and its interface strength is higher than that of pipe body
3. High toughness: the elongation at break of PE is generally more than 500%, which has strong adaptability to uneven settlement of pipe foundation and excellent seismic performance
4. Excellent resistance to slow crack growth (SCG) and rapid crack growth (RCP)
5. Excellent flexibility and scratch resistance
6. Good wear resistance, low friction coefficient of pipe wall, small flow resistance and strong conveying capacity
7. A variety of trenchless methods can be used, which greatly facilitates the construction and installation
8. The system cost is low and the maintenance cost is low, which can greatly reduce the engineering cost

Specification and model:
Implementation standard :GB 1558.1-2015

External Diameter dn	Nominal Wall Thickness en/mm
	SDR11b	SDR17b	SDR21c	SDR26c
20	3.0	─	─	─
25	3.0	─	─	─
32	3.0	3.0	─	─
40	3.7	3.0	─	─
50	4.6	3.0	3.0	─
63	5.8	3.8	3.0	─
75	6.8	4.5	3.6	3.0
90	8.2	5.4	4.3	3.5
10	10.0	6.6	5.3	4.2
125	11.4	7.4	60.	4.8
140	12.7	8.3	6.7	5.4
160	14.6	9.5	7.7	6.2
180	16.4	10.7	8.6	6.9
200	18.2	11.9	9.6	7.7
225	20.5	13.4	10.8	8.6
250	22.7	14.8	11.9	9.6
280	25.4	16.6	13.4	10.7
315	28.6	18.7	15.0	12.1
355	32.2	21.1	16.9	13.6
400	36.4	23.7	19.1	15.3
450	40.9	26.7	21.5	17.2
500	45.5	29.7	23.9	19.1
560	50.9	33.2	26.7	21.4
630	57.3	37.4	30.0	24.1
Note: b  as the first series c  SDR21 and SDR26 often used in trenchless gas pipeline repair