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Galvanized malleable iron union, 3/4 inch FNPT, Class 150, silver-grey finish

Anvil

Anvil 3/4" FNPT Galvanized Union 313822082

SKU CH-STEJ-1DF46

Galvanised malleable-iron union with FNPT ends, rated 300 psi at 150 °F and 150 psi saturated steam at 350 °F, meeting ASTM A197 and ASME B16.36

  • Galvanised malleable iron resists corrosion
  • Class 150 rating handles 300 psi water, oil, gas at 150 °F
  • FM approved and UL listed for code compliance
  • Meets ASME B 16.36 and ASTM A197 standards
  • Withstands 150 psi saturated steam at 350 °F

3/4" FNPT Galvanized Union

This Anvil union connects two sections of 3/4 inch FNPT pipe in residential or commercial plumbing systems. It is built from galvanized malleable iron rated to Class 150 for standard water, oil and gas service. The fitting meets ASTM A197, ASME B16.36 and carries FM and UL listings for code compliance. Installers needing a detachable joint for maintenance or equipment replacement will find it suitable.

Before ordering verify thread type

Confirm that the existing pipe ends are female NPT and that the system design pressure does not exceed 300 psi at 150 degrees F WOG. Saturated steam lines must stay at or below 150 psi at 350 degrees F. The temperature range spans minus 20 to 350 degrees F so ensure the medium stays within these limits. No gaskets or sealant are included so have pipe thread compound or tape ready for assembly.

Galvanized coating and standards compliance

The galvanized finish resists corrosion in potable water and general piping applications. FM approval and UL listing simplify inspection sign off on regulated projects. Compliance with ASME B16.36 ensures dimensional interchangeability with other Class 150 malleable iron fittings. These certifications reduce the risk of rejection during plan review or field inspection.

Highlights

  • Galvanised malleable iron resists corrosion
  • Class 150 rating handles 300 psi water, oil, gas at 150 °F
  • FM approved and UL listed for code compliance
  • Meets ASME B 16.36 and ASTM A197 standards
  • Withstands 150 psi saturated steam at 350 °F

Specifications

BrandANVIL

Questions about this item

Does the 3/4" FNPT galvanized union come with any gaskets or sealant, or must they be purchased separately?

The union is supplied as a single galvanized malleable iron fitting; thread sealant or gaskets are not included and must be sourced separately.

Which pressure rating should I rely on for a 300 psi water system at 150 °F?

The fitting is rated for 300 psi WOG at 150 °F, matching the stated maximum pressure for water, oil and gas service.

What does the 150 psi saturated steam rating at 350 °F mean for a low-pressure steam line?

It confirms the union can handle saturated steam up to 150 psi at 350 °F, covering typical low-pressure steam applications within the -20 °F to 350 °F temperature range.

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