| It is mainly used to produce PVC high strength | | | | can be conjuncted. In construction, it can easily keep |
| communicating perforated pipe. It has reasonable | | | | away from crooked road or situation where it |
| body, easy to operate, high degree of | | | | crosses other pipelines. |
| automatization, stable and reliable when it | | | | 3. Construction convenient, saving labor and time. The |
| successively produces, can rapidly produce. The main | | | | protecting cover and individual pipe come into one, |
| material of PVC high strength communicating | | | | not necessary to thread the individual pipe for |
| perforated pipe is high density PVC. Three plastic | | | | second time, cable can be threaded after being |
| extruders together extrude molded pipes, which are | | | | paved once, so it can avoid distortion and kinking of |
| mainly used as cover of cable and optical cable in | | | | individual pipe when threaded for the second time |
| freeway network communication project. | | | | and the trouble of confused taxis and repeated |
| Features of communicating pipeline: | | | | construction. It is easy to convey. The inner wall is |
| 1. Stress resistance and aging resistance. Using | | | | smooth so that the pipe can be easily threaded. |
| high-quality improved PVC project plastic extrudes | | | | There is assembling mark in the interface; |
| once, with high strength of shaping molding; the inner | | | | arrangement and conjuncture are in order. High |
| grid shape forms physics | | | | strength of stress resistance, buried depth is only |
| Steel structure, its rigidity is 10-100 times higher than | | | | required 0.3-0.5 meters, no need to make foundation |
| common plastic pipe. It is not necessary to envelop, | | | | and cement covering. Firstly backfill 20-centimeter |
| can replace steel tube put through the road safely. | | | | fine sand and then backfill earth, and then, it is open |
| Smolder (namely the ability of quenching is good), anti | | | | to traffic, no need to make foundation and cement |
| corrosion, aging resistance, with the longevity of over | | | | covering when crossing the road. If PE corrugated |
| 50 years. | | | | pipe cross the road, steel tube should be conjuncted |
| Comparation of stress resistance strength of some | | | | (quantity of steel used is large, cost is high, need to |
| commonly used underground communicating | | | | be welded, construction is cumbersome, easy to |
| pipeline:sort | | | | corrode, and longevity is short). Irrigation of cement |
| Double-wallcorrugated pipe | | | | needs a maintenance period. Optical cable can only be |
| PE smooth-wall pipe | | | | threaded when the individual pipe is threaded twice. |
| Single-hole grid pipestress resistance strength Kn/m2 | | | | Construction time can be shortened nearly 1/2 with |
| 9.2 | | | | the grid pipe than using PE/ corrugated pipe, nearly 3 |
| 10.2 | | | | 5 than using cement and steel tube. |
| 144stress resistance strength percentage | | | | 4. High utilization ratio, low full cost. Structure of the |
| 100% | | | | inner grid is square, combined with the protecting |
| 111% | | | | cover and individual pipe into one. The effective |
| 1565% | | | | space of the inner aperture is large. It is usable when |
| Remark: data in the table are from the testing report | | | | cutted and conjuncted, so material used can be |
| of National Chemical building materials quality | | | | saved and the cost of the project, which can be |
| supervision and inspection center. | | | | saved nearly 20% than using PE corrugated pipe, is |
| 2. Good flexibility, bend freely. The height of bent | | | | low. It even can replace steel pipe, so the investment |
| chord of 6-meter long pipe can be more than 1.2 | | | | can be saved 50% thereabout. |
| meters. If direction need to change, special bent head | | | | |