Quick details: Place of origin: Baku,Azerbaijan Material: HDPE Item: Winding Pipes Structure: Bellows inside and outside Certification: ISO9001 Color: black (inside yellow) Standard: OHSAS 18001 Specification: As your requirement OD: 800-3500 mm Length: 1-6 meters ( in specific order 12-18 meter) Packaging & delivery: Depends on your order. Description: Winding pipes of large diameter,high and low pressure.Standart length of this pipes: L= 6 meters.This length makes easy to package them in a raw,storage and transporting.Possibility: 1-6 meters for special targets.Some situation needs pipes with length,larger than standart,and less number of joints,so we could offer pipes of 2-3 sections with length 12 and 18 meters. Nominal diameter of the pipe corresponds to its inner diameter. Applied wall construction leads to the simplicity and strength of the pipe ring. Compared with other pipes, they dare less weight and wall structure of these pipes allows a higher tolerance to static loads. Structural rigidity depends on the type of profile. Profiles type PR: This type has a smooth inner and a ribbed outer surface. Low weight can be obtained a high hoop strength. Profiles type OP: This profile type also has a smooth inner and a ribbed outer surface. The external profile has the shape of "Olympic rings". It is also light weight and high strength ring.