APPLICATION & MATERIAL GUIDE

Bolting and Gasket Selection for Class 600 Flanges

The answer depends on flange material, facing, design temperature, service medium and applicable joint standard. Raised-face and RTJ assemblies use different gasket systems.

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YOUR QUESTION

What bolting and gasket should be used with a Class 600 flange?

OPTION 1

Carbon-steel flange joint

Grade
A105N flange · A193 B7 studs · A194 2H nuts
Reference standard
ASME B16.5 / B16.20

A common material family for many process applications, subject to rating review.

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OPTION 2

316L stainless flange joint

Grade
A182 F316L · B8M/8M bolting
Reference standard
ASME B16.5 / B16.20

Common corrosion-resistant joint family; bolting class and gasket must be designed.

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INFORMATION REQUIRED

Confirm before selection

  • RF, FF or RTJ facing
  • Pressure-temperature rating
  • Gasket winding/filler or ring material
  • Bolt coating, lubrication and assembly procedure
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