Production method for rigid polyurethane spraying polyethylene winding heat preservation pipe
A technology of rigid polyurethane and a production method, which is applied in the direction of tubular objects, other household appliances, household appliances, etc., can solve problems such as excess quality, and achieve the effects of short production cycle, obvious economic benefits, and simple process
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Embodiment 1
[0028] see figure 1 , a production method of rigid polyurethane spray-coated polyethylene winding insulation pipe, the production method comprises the following steps:
[0029] S1. Rust removal: Derust the inner and outer walls of the steel pipe, and use an angle grinder to drive a wire brush to grind and remove rust. When removing rust, a dust collection device is required. The dust collection device is used to remove the rust on the outside of the steel pipe. Dust can reduce the harm to the workers' body.
[0030] S2. Degreasing: Spray or soak the steel pipe with a degreasing agent to clean and remove oil.
[0031] S3. Cleaning: Use pure water to clean the residual degreasing agent on the steel pipe, first soak and clean, and then spray and clean. The temperature of pure water in soak and clean is 80 degrees Celsius, and the time for soak and clean is 20 minutes. Place it at an angle, and use 50 degrees Celsius pure water to spray pure water from the upper end of the steel...
Embodiment 2
[0040] see figure 1 , a production method of rigid polyurethane spray-coated polyethylene winding insulation pipe, the production method comprises the following steps:
[0041] S1. Rust removal: Derust the inner and outer walls of the steel pipe, and use an angle grinder to drive a wire brush to grind and remove rust. When removing rust, a dust collection device is required. The dust collection device is used to remove the rust on the outside of the steel pipe. Dust can reduce the harm to the workers' body.
[0042] S2. Degreasing: Spray or soak the steel pipe with a degreasing agent to clean and remove oil.
[0043] S3. Cleaning: Use pure water to clean the residual degreasing agent on the steel pipe, first soak and clean, and then spray and clean. The temperature of pure water in soak and clean is 90 degrees Celsius, and the time for soak and clean is 15 minutes. Place it at an angle, and use 55 degrees Celsius pure water to spray pure water from the upper end of the steel...
Embodiment 3
[0051] see figure 1 , a production method of rigid polyurethane spray-coated polyethylene winding insulation pipe, the production method comprises the following steps:
[0052] S1. Rust removal: Derust the inner and outer walls of the steel pipe, and use an angle grinder to drive a wire brush to grind and remove rust. When removing rust, a dust collection device is required. The dust collection device is used to remove the rust on the outside of the steel pipe. Dust can reduce the harm to the workers' body.
[0053] S2. Degreasing: Spray or soak the steel pipe with a degreasing agent to clean and remove oil.
[0054] S3. Cleaning: use pure water to clean the residual degreasing agent on the steel pipe, soak and clean first, and then spray and clean. The temperature of pure water in soak and clean is 100 degrees Celsius, and the time for soak and clean is 10 minutes. Place it at an angle, and use 60 degrees Celsius pure water to spray pure water from the upper end of the stee...
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