Teflon Coated Bolts Temperature Rating

Astm a193 a193m standard specification for alloy steel and stainless steel bolting for high temperature or high pressure service and other special purpose applications. B7 hex cap screws ptfe brown b7 studs ptfe green xylan blue ptfe b7 hex cap screws hex bolts. Astm a193 grade b7 teflon coated stud bolts governing standards.

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Bolting torque table 5 ptfe coated astm a193 b7 and astm 193 b16 stud bolts.

Teflon coated bolts temperature rating.

Teflon industrial coatings are desirable for use across many applications based on the following properties. Non metallics have a chance to shine in cold temperatures especially teflon. Do they work for more size and strength. Astm a193 b7 stud bolts with a diameter of 2 5 inches or less will have a yield strength of 105 000 psi.

Astm standards for mechanical fasteners and related process 2nd edition inch fastener standards 8th edition. 10626 s choctaw dr baton rouge la 70815. Ptfe coated studs bolts and nuts ptfe coated fastener s provides great corrosion resistance very low coefficient of friction consistent tensioning and ease of installation and removal. Extensive testing and field use have proven that the future of coated fastener s lies with fluoropolymer coatings.

Asme b16 5 covers recommended stud bolt quantity diame. All material included on this page is informational only and should not be used as one s sole source for design purposes south coast industrial metals inc does not guarantee the accuracy of the information on this site and retain no liability for the use or misuse of the. When the task calls for ptfe fasteners coated teflon stud bolts and teflon nuts call lightning bolt. For frigid conditions between 100 and 300 degrees fahrenheit stainless steel is your best bet.

Typically a coated stud will have a lower temperature rating than plain finish stud bolts. Nickel rich grades like aisi 4340 and 8740 can be used if the temperature stays above 100 degrees fahrenheit. Few solid substances adhere permanently to a teflon industrial coating. Bolting torque table 3 use only with a193 b8 cl1 bolts at 540 c 650 c on uninsulated flanges.

Bolting torque table 4 use only with 6061 t6 aluminium flanges. Bolting torque table 5a cold service ptfe coated astm a320 grade l7 stud bolts. Tacky materials may stick temporarily but almost all substances release easily. See our article ptfe coated studs.

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