Underground rigid pipe for connection has surrounding material which acts as adhesive whereby it can also adjust itself with any kind of temperature changes

摘要

The underground rigid pipe (1) consists of surrounding material (9,3) which itself acts as adhesive between pipe and the surrounding material. This arrangement for pipe is not affected by temperature changes e.g. contraction or expansion, because of tubing compensator (6) provided near both ends. The surrounding material has sand and clay as its primary ingredients.