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A194 2H Xylan Coated Nut
QS Fastener: A194 2H Xylan Coated Nut
Name: A194 2H Xylan Coated Nut
Standard: ANSI 18.2.2
Material: A194 2H
Size: 1/2 to 4 Inch
Surface Finishing: Xylan Coated
Grade: A
Application: Oil Pipeline, Machinery, Chemical Industry, Building
Standard: ANSI 18.2.2
Material: A194 2H
Size: 1/2 to 4 Inch
Surface Finishing: Xylan Coated
Grade: A
Application: Oil Pipeline, Machinery, Chemical Industry, Building
Quantity
The A194 2H Xylan Coated Nut is made from A194 2H material and complies with ANSI 18.2.2 standards. It is available in sizes ranging from 1/2 to 4 inches, with a Xylan coating that provides excellent corrosion and chemical resistance. With Grade A quality, the A194 2H Xylan Coated Nut is ideal for applications in oil pipelines, mechanical equipment, the chemical industry, and construction projects, making it a durable and reliable choice for harsh environments.
1. Chemical Resistance
The Xylan coating on the A194 2H Xylan Coated Nut is a high-performance polymer coating that offers exceptional chemical resistance, maintaining stability in various chemical media.
The Xylan coating on the A194 2H Xylan Coated Nut is a high-performance polymer coating that offers exceptional chemical resistance, maintaining stability in various chemical media.
Acid Resistance:
The Xylan coating exhibits excellent resistance to common inorganic acids (such as hydrochloric acid, sulfuric acid, and nitric acid) and organic acids (such as acetic acid and oxalic acid). In environments with a pH range of 2-12, the coating remains intact and functional over extended periods. For example, after immersion in a 10% hydrochloric acid solution for 1000 hours, the A194 2H Xylan Coated Nut shows no significant corrosion or peeling.
The Xylan coating exhibits excellent resistance to common inorganic acids (such as hydrochloric acid, sulfuric acid, and nitric acid) and organic acids (such as acetic acid and oxalic acid). In environments with a pH range of 2-12, the coating remains intact and functional over extended periods. For example, after immersion in a 10% hydrochloric acid solution for 1000 hours, the A194 2H Xylan Coated Nut shows no significant corrosion or peeling.
Alkali Resistance:
The coating demonstrates outstanding resistance to alkaline media (such as sodium hydroxide and potassium hydroxide). Even in strong alkali environments with a pH of up to 14, the coating retains its physical and chemical properties. For instance, after immersion in a 20% sodium hydroxide solution for 500 hours, the surface of the A194 2H Xylan Coated Nut shows no noticeable changes.
The coating demonstrates outstanding resistance to alkaline media (such as sodium hydroxide and potassium hydroxide). Even in strong alkali environments with a pH of up to 14, the coating retains its physical and chemical properties. For instance, after immersion in a 20% sodium hydroxide solution for 500 hours, the surface of the A194 2H Xylan Coated Nut shows no noticeable changes.
Oil Resistance:
The Xylan coating exhibits good resistance to various mineral oils, vegetable oils, and synthetic oils. Under high-temperature oil immersion conditions (e.g., 150°C), the coating does not soften or dissolve. For example, in ASTM D471 standard tests, the coating showed a mass loss rate of less than 1% after immersion in 150°C engine oil for 72 hours.
The Xylan coating exhibits good resistance to various mineral oils, vegetable oils, and synthetic oils. Under high-temperature oil immersion conditions (e.g., 150°C), the coating does not soften or dissolve. For example, in ASTM D471 standard tests, the coating showed a mass loss rate of less than 1% after immersion in 150°C engine oil for 72 hours.
Solvent Resistance:
The coating demonstrates excellent resistance to various organic solvents (such as acetone, methanol, ethanol, and xylene). In ASTM D543 standard tests, the coating maintained an adhesion rating of 5B (the highest level) after immersion in acetone for 48 hours.
The coating demonstrates excellent resistance to various organic solvents (such as acetone, methanol, ethanol, and xylene). In ASTM D543 standard tests, the coating maintained an adhesion rating of 5B (the highest level) after immersion in acetone for 48 hours.
Salt Spray Resistance:
According to ASTM B117 salt spray tests, the Xylan coating showed no signs of rust or peeling after 1000 hours of exposure, proving its exceptional corrosion resistance in marine environments.
According to ASTM B117 salt spray tests, the Xylan coating showed no signs of rust or peeling after 1000 hours of exposure, proving its exceptional corrosion resistance in marine environments.
2. Low Friction Coefficient
The Xylan coating on the A194 2H Xylan Coated Nut has self-lubricating properties, reducing friction during installation and extending service life.
The Xylan coating on the A194 2H Xylan Coated Nut has self-lubricating properties, reducing friction during installation and extending service life.
Friction Coefficient Range:
The dynamic friction coefficient of the Xylan coating typically ranges from 0.08 to 0.12, significantly lower than that of uncoated carbon steel (0.15-0.20). This property makes the A194 2H Xylan Coated Nut smoother during installation, reducing torque requirements and minimizing thread wear.
The dynamic friction coefficient of the Xylan coating typically ranges from 0.08 to 0.12, significantly lower than that of uncoated carbon steel (0.15-0.20). This property makes the A194 2H Xylan Coated Nut smoother during installation, reducing torque requirements and minimizing thread wear.
Self-Lubricating Properties:
The coating contains solid lubricants (such as PTFE or MOS2), which form a lubricating film on the friction surface, reducing direct metal-to-metal contact. This self-lubricating feature not only lowers installation torque but also significantly extends the service life of the A194 2H Xylan Coated Nut. For example, in ASTM D2670 wear tests, the wear rate of the Xylan coating was over 60% lower than that of uncoated nuts.
The coating contains solid lubricants (such as PTFE or MOS2), which form a lubricating film on the friction surface, reducing direct metal-to-metal contact. This self-lubricating feature not only lowers installation torque but also significantly extends the service life of the A194 2H Xylan Coated Nut. For example, in ASTM D2670 wear tests, the wear rate of the Xylan coating was over 60% lower than that of uncoated nuts.
Torque and Preload Relationship:
Due to its low friction coefficient, the A194 2H Xylan Coated Nut requires significantly lower installation torque. For instance, under the same preload conditions, the installation torque of the A194 2H Xylan Coated Nut is approximately 30% lower than that of uncoated nuts. This simplifies the installation process and reduces the risk of thread damage caused by over-torquing.
Due to its low friction coefficient, the A194 2H Xylan Coated Nut requires significantly lower installation torque. For instance, under the same preload conditions, the installation torque of the A194 2H Xylan Coated Nut is approximately 30% lower than that of uncoated nuts. This simplifies the installation process and reduces the risk of thread damage caused by over-torquing.
Anti-Galling Performance:
The coating effectively prevents thread galling, especially when used with stainless steel or titanium alloy bolts. According to ASTM G98 tests, the A194 2H Xylan Coated Nut showed no galling after 500 repeated tightening-loosening cycles.
The coating effectively prevents thread galling, especially when used with stainless steel or titanium alloy bolts. According to ASTM G98 tests, the A194 2H Xylan Coated Nut showed no galling after 500 repeated tightening-loosening cycles.
Temperature Stability:
The low friction coefficient of the coating remains stable over a wide temperature range (-50°C to +200°C). At high temperatures, the coating does not soften or lose its lubricating properties, while at low temperatures, it maintains good lubrication, ensuring reliable installation and use of the A194 2H Xylan Coated Nut.
The low friction coefficient of the coating remains stable over a wide temperature range (-50°C to +200°C). At high temperatures, the coating does not soften or lose its lubricating properties, while at low temperatures, it maintains good lubrication, ensuring reliable installation and use of the A194 2H Xylan Coated Nut.
3. Real-World Application Cases
Chemical Equipment: In a chemical plant’s reactor connections, the use of the A194 2H Xylan Coated Nut reduced installation torque by 25%, and after two years of operation in a high-concentration acid environment, no corrosion or loosening was observed.
Chemical Equipment: In a chemical plant’s reactor connections, the use of the A194 2H Xylan Coated Nut reduced installation torque by 25%, and after two years of operation in a high-concentration acid environment, no corrosion or loosening was observed.
Offshore Platforms: In critical connection points on an offshore oil platform, the A194 2H Xylan Coated Nut operated for five years in salt spray and seawater environments, with the coating intact and no thread corrosion.
Mechanical Equipment: In high-load connections of heavy-duty construction machinery, the service life of the A194 2H Xylan Coated Nut was extended by 50% compared to standard nuts, with significantly reduced maintenance frequency.
The chemical resistance and low friction coefficient of the A194 2H Xylan Coated Nut are its core advantages, meeting high-performance demands in harsh working conditions. Its excellent chemical resistance ensures long-term stability in various corrosive media, while the low friction coefficient significantly improves installation efficiency and product lifespan. These properties make the A194 2H Xylan Coated Nut an ideal choice for industries such as oil, chemicals, marine engineering, and mechanical equipment.
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