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Steel sets of steel insulation tube is divided into three levels from the inside to the outside
First layer: the work of steel pipe layer design and customer requirements is generally used inseamless pipe (GB8163-87) spiral welded pipe (GB9711-88; SY/T5038-92) and Longitudinal (GB3092-93). Theprocessing of the steel pipe surface after shot blasting process, rust, steel grade up to GB8923-1988standard of Sa2, surface roughness up to GB6060.5-88 R = 12.5 microns.
The second layer: polyurethane insulation with high-pressure foaming machine in the cavity formed bythe pipe between the outer casing of a one-time injected into the liquid of rigid polyurethane foammade​​. Commonly known as the "tube in tube foaming process." Its role in First waterproof, insulation,support hot net weight. When the transmission medium temperature: -50 ℃ -120 ℃, the choice of rigidpoly semicarbazide ester foam as insulation layer.
The third layer: anti-corrosion steel pipe
The anti-corrosion pipe insulation is an anti-corrosion performance of steel pipe, and has good insulation properties, is widely used in the construction and promotion, and continuous improvement andpopularization. The anti-corrosion pipe insulation have different processing types and methods ofdifferent processing methods to determine the steel pipe has a different performance and functionality,and the use of the range will change.
Production of the anti-corrosion pipe insulation in accordance with national standards of production,different processing methods follow different standards, but must comply with national production standards, and should strictly follow and implement.
Steel sets of steel steam insulation tube