PTFE LINED PIPE BY RAM EXTRUSION
Lining process description:
First, high-performance PTFE powder is used, Extrusion into a tube, and the surface is chemically treated, and then lining it into a seamless steel pipe (the outer diameter of the liner is slightly larger than the inner diameter of the steel pipe of 1.5-2 mm) to form a tight-fitting liner. In order to eliminate the stress, it is placed in a furnace, heated to 180 ° C for constant temperature treatment. At the same time, the axial tensile strength of the extrusion pressure tube is significantly better than that of the wound tube, and can be used in the micro negative pressure pipeline.
Lining material: PFA, PTFE
Nominal diameter: DN25~DN300, 1″~12″
Production length: ≤ 6000mm (caliber ≤ DN150) ≤ 4000mm (caliber > DN150)
Applicable temperature: -29 ° C ~ 180 ° C
Applicable medium: It can transport any concentration of strong acid, strong alkali, organic solvent, strong oxidant, toxic and other corrosive media.
Since the introduction and research of the overall molded PTFE lining technology in 2007, the company has successfully developed overall molding, isostatic pressing, injection molding, transfer molding, extrusion, Three-dimensional rotating and other lining molding products, the characteristics are as follows:
●The use temperature is high. In the case of strong corrosive media, it can be used in the temperature range of -29 ° C ~ 200 ° C, in this temperature range (except molten alkali metal, elemental fluorine and aromatic hydrocarbons), to meet all chemical media.
●Resistant to vacuum. In the range of -29 ° C ~ 150 ° C, can be used under vacuum conditions, in chemical production, often due to cooling, longitudinal discharge, pump and valve asynchronous operation, etc. caused by the local medium backflow to create a vacuum state.
● High pressure resistance. It can withstand a service pressure of up to 3.0 MPa in the temperature range.
● Resistance to penetration. The high-quality imported PTFE resin is processed into a high-density, sufficient-thickness PTFE lining layer through advanced lining process, which makes the product superior in permeability resistance.
● The overall PTFE molding and sintering process lining solves the problem of steel-fluorine cold heat expansion and contraction, so that it can achieve synchronous expansion and contraction.
The product design conforms to domestic and international standards such as HG, GB, DIN, ANSI, JIS.
Specific gravity: 2.14-2.19g/cm3 According to ASTM D 792 test standard.
Tensile strength: 20.7 MPA minimum according to ASTM D 638 test standard.
Elongation break: 250% minimum according to ASTM D 638 test standard.
Production standard: ASTM D 4895 The reference PTFE material meets the above minimum standards to meet the working medium: normal use within 150 ° C full vacuum.