Fluorine plastic lining corrosion-resistant valve is the PTFE resin (or profile processed) using molded (or inlaid) method is placed on the inner surface of the steel or iron valve pressure parts or valve inner parts of the outer surface, the use of its In the anti-corrosive medium valve unique properties into a variety of valves and pressure vessels.
Teflon, commonly known as "plastic king", was first developed by the United States Dupout.LTD in 1938 and industrialized in 1949. It has been used in the valve industry for 50 years from the industrial point of view Time is not long.
In the corrosion-resistant materials, PTFE has incomparable excellent performance, in addition to the molten metal, elemental fluorine and aromatic hydrocarbons, in various concentrations of hydrochloric acid, sulfuric acid, nitric acid, aqua regia, organic acids, strong oxidants, concentrated , Alternating with dilute acid, alternating base and various organic agents showed a random reaction, the PTFE lining on the valve wall, both to overcome the shortcomings of low strength Teflon material, but also to solve the valve subject matter anti-corrosion Poor performance and high cost. In addition to PTFE with excellent chemical stability, its anti-fouling, anti-sticking, static and dynamic friction coefficient is very small, wear-off-run good performance, as the valve opening and closing of the seal, to reduce the sealing surface Between the friction, reducing the valve operating torque and improve product life, the scope of its use can also be extended to the food, pharmaceutical industry.
Lined fluorine valve, also known as anti-corrosion valve, it is often in a harsh environment conditions, not toxic and harmful chemicals, is highly corrosive all kinds of acid-base or organic solvent, improper use will have significant economic losses and serious as a result of. Correct use and maintenance of the valve can extend the service life of fluorine-lined valves, then what details can be done to protect it?
1, before use, carefully read the fluorine valve manual.
2, according to the nameplate or instructions on the pressure, temperature, the use of medium range.
3, the use of anti-fluorine valve to prevent temperature changes due to excessive pipe stress, minimize temperature changes, and before and after the valve to increase the U-shaped expansion joint.
4, prohibit the use of lever to open and close the fluorine valve, pay attention to observe the opening and closing instructions fluorine valve position and limit device, open and close in place, not to forcibly closed, to avoid premature fluorocarbon sealing surface damage.
5, for some media instability and easy decomposition (such as the decomposition of some media will cause the volume expansion caused by abnormal pressure conditions) can cause valve damage or leakage, measures should be taken to eliminate or limit the factors that cause unstable media decomposition . Valve selection, the media should be unstable and easy to decompose may cause changes in conditions and choose a pressure relief device can be automatically lined with fluorine valve.
6, for toxic, flammable, explosive, corrosive medium pipeline lined with fluorine valve, it is strictly prohibited to replace the packing under pressure. Although the fluorine-containing valve is designed to have a sealing function, it is not recommended to change the packing under pressure.
7, For pipes with self-igniting medium, measures should be taken to ensure that the ambient temperature and working temperature should not exceed the self-ignition point of the medium to prevent the danger caused by sunlight or external fire.
Suitable medium: various concentrations of acid and alkali salts and some organic solvents.
Features: The world is currently the best anti-corrosion materials, has been widely used in rotary molding of large equipment and pipe lining.
- Specification:
- 1. Out diameter: 406.4mm - 1422.4mm (16"-56")
- 2. Thickness: 9.5mm-38.1mm
- 3. Length: 6m-12.5m
- 4. Type: LSAW (Longitudinal Submerged-Arc Welded), DSAW (Double Submerged-arc welded) Steel Pipe
- 5. Manufacturing Process:JCO(JCOE,COE)
- 6. Standard: API SPEC 5L (ISO 3183), GB/T 9711.1, GB/T 9711.2, GB/T 9711.3 BSEN10217
- 7. Uses: for conveying gas, water and oil, in the oil or natural gas industries
- 8. Chemical Analysis (%):
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Standard Type of pipe Class Grade C max Si max Mn max P max S max V max Nb max Ti max API SPEC 5L
/ISO 3183WELD PSL1 L245 B 0.26 - 1.2 - 0.03 0.03 - - L290/X42 0.26 - 1.3 - 0.03 0.03 - - L320/X46 0.26 - 1.4 - 0.03 0.03 - - L360/X52 0.26 - 1.4 - 0.03 0.03 - - L390/X56 0.26 - 1.4 - 0.03 0.03 - - L415/X60 0.26 - 1.4 - 0.03 0.03 - - L450/X65 0.26 - 1.4 - 0.03 0.03 - - L485/X70 0.26 - 1.4 - 0.03 0.03 - - PSL2 L245M/GR.BM 0.22 0.45 1.2 0.025 0.015 0.05 0.05 0.04 L290M/X42M 0.22 0.45 1.3 0.025 0.015 0.05 0.05 0.04 L320M/X46M 0.22 0.45 1.3 0.025 0.015 0.05 0.05 0.04 L360M/X52M 0.22 0.45 1.4 0.025 0.015 - - - L390M/X56M 0.22 0.45 1.4 0.025 0.015 - - - L415M/X60M 0.12 0.45 1.6 0.025 0.015 - - - L450M/X65M 0.12 0.45 1.6 0.025 0.015 - - - L485M/X70M 0.12 0.45 1.7 0.025 0.015 - - - L555M/X80M 0.12 0.45 1.85 0.025 0.015 - - - - 9. Mechanical Properties
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Standard Class Grade Yield Strength (MPa) Tensile Strength (MPa) Elongation(%) Y.S/T.S API SPEC 5L
/ISO 3183PSL1 L245 B min 245 415 b - L290/X42 min 290 415 b - L320/X46 min 320 435 b - L360/X52 min 360 460 b - L390/X56 min 390 490 b - L415/X60 min 415 520 b - L450/X65 min 450 535 b - L485/X70 min 480 470 b - PSL2 L245N/BN
L245M/BMmin 245 415 b - max 450 760 b 0.93 L290N/X42N
L290M/X42Mmin 290 415 b - max 495 760 b 0.93 L320N/X46N
L320M/X46Mmin 320 435 b - max 525 760 b 0.93 L360N/X52N
L360M/X52Mmin 360 460 b - max 530 760 b 0.93 L390N/X56N
L390M/X56Mmin 390 490 b - max 545 760 b 0.93 L415N/X60N
L415M/X60Mmin 415 520 b - max 565 760 b 0.93 L450M/X65M min 450 535 b - max 600 760 b 0.93 L485M/X70M min 485 570 b - max 635 760 b 0.93 L555M/X80M min 555 625 b - max 705 825 b 0.93
LSAW Steel Pipe,LSAW Steel Tube,LSAW L360 Steel Pipe ,LSAW L485 Steel Pipe
HeBei GuangHao Pipe Fittings Co .,LTD (Cangzhou Sailing Steel Pipe Co., Ltd) , https://www.guanghaofitting.com