When people meet collapse during Tunnel Project ,Life Saving UHMWPE Pipe is a best choice.This product is with high Impact resistance,Non Toxic,easy-carry, and  so on.According to the  human dimensions theory, the diameter of Life Saving UHMWPE Pipe (escape pipe) is 800 mm,wall thickness is 30mm FAQ Q May I have some samples before bulk order? A  Yes, you can. We can arrange the shipment according to your requirements. Q  Do you have quality control? A  Sure. We have the most advanced testing equipment for very strict quality control Q How about the delivery? A  By containers on ship or railway wagon ,and bulk ship Safe and cost effective way of delivery Q What about the lead time for mass production? A  Honestly, it depends on the order quantity and the season you place the order.