UL 213 2022-04 PDF

Full title and description

St UL 213 2022-04 — UL 213: Rubber‑Gasketed Fittings for Fire‑Protection Service. This entry refers to the UL 213 main standard (Edition 5) and the formal revision/change issued in April 2022 (Change 04/22), which updates test, marking and installation‑compatibility requirements for rubber‑gasketed couplings, grooved fittings and related side outlets used in water‑based fire protection systems.

Abstract

UL 213 specifies performance, test methods and marking requirements for rubber‑gasketed fittings intended for use in fire‑protection service (for example, couplings that join run pipe and side outlets that form branch connections). The standard aligns product evaluation and listing with installation standards such as NFPA 13 and NFPA 14, and addresses mechanical strength, sealing, pressure capability and service compatibility for components used in sprinkler and standpipe systems. The April 2022 change (04/22) contains targeted updates to tests and/or administrative requirements within Edition 5.

General information

• Status: Active (current UL standard with periodic revisions and change pages available).
• Publication date: Edition 5 originally published July 12, 2019; Change 04/22 published April 22, 2022 (Change 04/22).
• Publisher: Underwriters Laboratories (UL).
• ICS / categories: 13.220 (Protection against fire) — fire‑protection equipment and fittings (commonly catalogued under 13.220.20 / fire protection).
• Edition / version: Edition 5 (with Change 04/22 — April 22, 2022).
• Number of pages: Approximately 22–23 pages depending on the publisher/format (UL distribution and commercial re‑sellers list the document at ~22–23 pages).

Scope

UL 213 covers rubber‑gasketed fittings intended for assembling pipe sections in water‑based fire protection systems — examples include grooved couplings, flexible couplings, and side outlets for branch connections. Requirements are intended to demonstrate mechanical integrity, sealing performance and suitability for use with listed steel sprinkler pipe and in accordance with applicable NFPA installation standards (e.g., NFPA 13 and NFPA 14). The scope also references compatibility and installation context defined by the Authority Having Jurisdiction (AHJ).

Key topics and requirements

• Mechanical strength and bending‑moment resistance tests for couplings and outlets.
• Hydrostatic and cyclic pressure testing to verify leak‑tight performance under service conditions.
• Gasket material aging and compatibility tests to confirm long‑term sealing performance.
• Dimensional, assembly and marking requirements (traceability, size/pressure ratings and installation instructions).
• Compatibility and intended‑use declarations referencing NFPA installation requirements (e.g., allowable uses in sprinkler and standpipe systems).
• Special outlines and companion documents (for example UL 213B for welded outlet fittings) that apply when alternate attachment or fabrication methods are used.

Typical use and users

UL 213 is used by manufacturers of couplings, grooved fittings and side outlets to develop and certify products for fire‑protection service; by testing and certification laboratories to design and run required tests; by specifying engineers and designers to select compliant components for sprinkler and standpipe systems; and by authorities having jurisdiction (AHJs), contractors and installers who verify that installed fittings are suitable and properly marked for use in NFPA‑governed systems.

Related standards

Relevant companion and related documents include: UL 213B (Outline of Investigation for Welded Outlet Fittings for Fire Protection Systems, Ed. 6/2022), NFPA 13 (Installation of Sprinkler Systems), NFPA 14 (Installation of Standpipe and Hose Systems), ISO and other hose/fitting standards for flexible assemblies (e.g., ISO 6182 series), and product‑specific UL outlines and certification requirements that address piping, couplings and joints. Users should reference the exact UL edition/change or UL outline cited on a product’s listing for formal applicability.

Keywords

UL 213, rubber‑gasketed fittings, couplings, grooved coupling, side outlet, fire‑protection fittings, sprinkler fittings, NFPA 13, NFPA 14, gasket aging, hydrostatic test, bending moment, UL 213B.

FAQ

Q: What is this standard?

A: UL 213 is the Underwriters Laboratories’ standard that defines testing, performance and marking requirements for rubber‑gasketed fittings used in water‑based fire protection systems (couplings, grooved fittings and side outlets). It is the primary U.S. listing/test standard for this product class.

Q: What does it cover?

A: It covers intended product types (gasketed couplings, side outlets, and similar fittings), mechanical and pressure performance tests (hydrostatic, cyclic, bending), gasket/material compatibility and required markings and installation information to show suitability for sprinkler and standpipe applications.

Q: Who typically uses it?

A: Manufacturers, testing/certification labs, specifying engineers, contractors/installers, and AHJs—any party that manufactures, verifies, specifies or inspects rubber‑gasketed fittings for fire‑protection systems.

Q: Is it current or superseded?

A: The baseline Edition 5 was published July 12, 2019 and the document received a formal change identified as Change 04/22 (April 22, 2022). UL continues to maintain the standard with periodic changes; check the UL Standards catalog or the product listing on the manufacturer’s UL file to confirm the exact revision used for a listed product. As of the most recent UL catalog entries the Edition 5 text with subsequent change pages remains active.

Q: Is it part of a series?

A: Yes — UL 213 is implemented alongside companion outlines and documents (for example UL 213B for welded outlets) and is referenced by installation codes/standards such as NFPA 13 and NFPA 14. Manufacturers often use UL 213 plus applicable UL outlines to support different attachment or fabrication methods.

Q: What are the key keywords?

A: Rubber‑gasketed fittings; couplings; grooved fittings; side outlets; sprinkler fittings; hydrostatic test; bending moment; gasket aging; UL listing; NFPA compatibility.