Hot straight seam steel pipe manufacturers, the small caliber in the output of crude oil or heating pipes, in order to reduce the heat pipes to the soil, outside the pipe plus insulation composite layer. Commonly used insulation material is a rigid polyurethane foam, a temperature of -185 ~ 120 ℃. This material is soft texture, to increase its strength, insulation on the outside add a layer of high density polyethylene cladding layer, to form a composite structure, in order to prevent infiltration of groundwater within the insulation.
Ordinary straight seam steel pipe for use in harsh environmental conditions, there will be severe corrosion, which will reduce the life of the steel pipe, anti-corrosion pipe insulation is relatively long service life, under normal circumstances can be used are 30-50 years or so, and the correct installation and use is also possible to make the pipe network maintenance costs low, corrosion pipe insulation can also set the alarm system, automatic leak detection pipe network failure, the exact knowledge of the fault location and automatically alarms.
Pipe insulation is widely used in the construction and promotion, and production technology constantly improve and popularize. Pipe insulation has a good performance can promote their use in a good range, different parts of the structure and cooperate with each other in use, play an important role and value. Polyurethane foam has good mechanical properties and thermal insulation properties, usually can be temperature 120 ℃, by modification or other insulating material combinations can be temperature 180 ℃.
