|Pressure Grade:||- 0.097 - 1.0 MPa||Internal Coating:||Polyethylene|
|Horizontal Liquidity:||22~28||Particle Size Distribution:||150um≤3；250um≤0.2|
plastic coated steel tube,
powder coated steel pipe
Internal External Epoxy Lined Steel Pipe Spiral Welded DN100mm - DN1000mm
Mine pipe refers to a product specially developed for special underground environmental conditions, which has the advantages of flame retardant, antistatic, corrosion resistance, long service life and strong safety. It is mainly used in five systems: mine drainage pipe (KS), mine grouting pipe (KJ), mine positive pressure air pipe (KFZ), mine negative pressure air pipe (KFF), mine gas drainage pipe (KW).
Pipeline for gas drainage in underground coal mine, bearing pressure - 0.097 - 1.0 MPa.
1)Flame retardant and antistatic performance is good: flame retardant and antistatic indicators meet the requirements of underground gas drainage pipe indicators. Flame retardant: The arithmetic average of flameless combustion time is less than 3S and the maximum is less than 10s; the arithmetic average of flameless combustion time is less than 20s and the maximum is less than 60s. Antistatic: internal and external surface resistance≤1.0×106Ω
2)Good hygienic performance, low fluid resistance: in line with the drinking water standards of the Ministry of Health, no fouling, no breeding of microorganisms, no secondary pollution of fluids. The inner wall is smooth and the conveying efficiency is high.
3)Connection modes are diversified and easy to construct: Flange connection and butt welding connection can be used for products. Connection modes are diversified and installation is convenient.
National Standard Specification and Coating Thickness
|DN||internal coating||external coating|
|Ordinary level||Reinforcement level||polyethylene||epoxy resin|
|Ordinary level||Reinforcement level||Ordinary level||Reinforcement level|
|Remarks||Seamless steel pipe, spiral welded pipe and straight welded pipe can be selected as the base pipe, and the thickness of plastic coating can be processed according to customer's requirements.|
Properties of Epoxy resin powder
|Particle size distribution /%||150um≤3；250um≤0.2||GB/T 6554|
|nonvolatile content /%||≥99.5||GB/T 6554|
|Horizontal liquidity /mm||22~28||GB/T 6554|
|Gelation time /s||≤120(200℃)||GB/T 6554|
|impact strength /(kgcm)||≥50||GB/T 1732|
|Bending test /(¢2 mm)||pass||GB/T 6742|
|Hygienic performance||Conform to GB/T 17219|