Technical Requirements for Heat Preservation of Spiral Steel Pipes

After the heat insulation treatment of spiral steel pipes(SSAW steel pipe), people are accustomed to call them heat insulation steel pipes.The insulation layer of heat insulation steel pipes is filled with rigid polyurethane foam. The quality requirements for the insulation layer of spiral steel pipes are as follows:
1. Polyurethane foam should be free of stains and shrinkage and delamination. Cells should be uniform and fine, and the average cell size should not be greater than 0.5mm.
2. The insulation layer of the spiral steel pipe should be evenly filled with the annular space between the working steel pipe and the outer protective pipe. The sum of the area of ​​voids and bubbles on the cross section of any insulation layer should not exceed 5%, and the size of a single hole in any direction should not exceed one third of the actual insulation layer at the same
3. The density of the polyurethane foam at any position of the insulation layer should not be less than 60kg / m3.
4. The radial compressive strength or relative radial deformation of the thermal insulation layer of the spiral steel pipe is 10% and the compression force should not be less than 0.3Mpa.
5. Water absorption of polyurethane insulation layer should not be greater than 10%.
6. The closed cell ratio of polyurethane foam should not be less than 88%.
7. The thickness of the insulation layer shall meet the design requirements, and the surface temperature of the outer protective tube shall not be greater than 50 ° C during operation.
8. The thermal conductivity of the unaged polyurethane foam at 50 ° C should not be greater than 0.033 [W / (m-K)].The thermal insulation layer of spiral steel pipe is an important part of thermal insulation steel pipe.It is a key link to ensure the temperature of the conveying medium.Polyurethane foam has good mechanical properties and thermal insulation properties.It can normally withstand temperatures of 120 ° C through modification or with Other combinations of insulation materials can withstand temperatures up to 180 ° C. High-quality polyurethane raw materials and rigorous production technology can produce perfect spiral steel pipes.

New service from OilVoice
Trip Shepherd is for companies who need to track their staff in areas of risk.
It's free to use, so we invite you to try it.

Visit source site

spiral steel pipessaw steel pipeheat preservationwelded pipe

More items from lvy

Annealing Process of Seamless Steel Pipe

Annealing process of  seamless steel pipe : 1. Fully annealed. It is used to refine the coarse and superheated structure with poor mechanical properties in medium and low carbon steels after casting, forging and welding. The workpiece is heated to a temperature between 30 and 50 ° C above the temper ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd

Posted 3 days agoPress > Seamless steel pipecarbon steelannealing process

API Coupling for Tubing and Casing Pipe

The  casing pipe  coupling is a kind of oilfield drilling tool, which is mainly used for the connection of the oil pipe, and mainly solves the problem that the existing coupling easily generates fatigue fracture due to stress concentration. The tubing coupling structure is: the tubing end is connec ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd

Posted 10 days agoPress > couplingcasing pipetubing

Oil Casing Pipe Tempering Process and Category

The tempering process of the  casing pipe  is a heat treatment process of reheating the quenched workpiece to a suitable temperature lower than the lower critical temperature, and cooling to room temperature in a medium such as air or water or oil after a certain period of time. The purpose of temp ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd

Posted 16 days agoPress > casing pipeTempering ProcessCategory

Specification and Requirements for Seamless Steel Pipe Marking

In the relevant regulations, there are a series of regulations and requirements for  seamless steel pipe  marking. The specific requirements for the logo are as follows: 1. The seamless steel pipe manufacturer's logo should be eye-catching, firm, clear, standardized, and not easy to fade. 2. The m ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd

Posted 18 days agoPress > Seamless steel pipemarking3PE

What are the Detection Methods of Oil Casing Pipes?

What are the detection methods for casing pipes ? Let's take a brief look: 1. Ultrasonic testing. When ultrasonic waves are scattered in the tested raw materials, the acoustic properties of the raw materials and the transformation of the internal structure have a positive impact on the disseminat ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd

Posted 23 days agoPress > casing pipeN80 oil casingDetection Methods
All posts from lvy