2) pipe ring stiffness of choice is an important indicator of price pe plastic pipe bellows design, so should the pipeline depth, ground load, nature and trench backfill compaction factor and construction loads and other factors considered OK. Blind high ring stiffness uneconomical. Depth of less than 1.0m under the roadway pe double-wall corrugated pipe conduit, pipe deformation should also consider the impact on the road. Xiong Wang Thai Plastic Products Factory Size: Pipe nominal diameter (DN / OD OD Series) by the public, said the size, can also be nominal inside diameter (DN / ID internal diameter of the series) that size. OD Series, Pipe inner diameter size should be in accordance with Table 3 and Table 4 of this regulation, the minimum average inner diameter and socket should not be less than the maximum average outside diameter of the pipe. Socket wall thickness of pipes and fittings shall comply with the relevant provisions of GB / T 19472.1-2004 standard. Table 3 OD Series Pipe Size (mm) Xiong Wang Thai Plastic Products Factory wholesale pe bellows, Zigong pe bellows, provided by Xiong Xiong Wong Tai Wang Thai Plastic Products Factory. Xiong Wang Thai Plastic Products Factory (www.wangtai668.com) strong, credible, in Baoding UPVC pipe industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Taihe Wang Xiong you hand into the brilliant, for a better future!