UL 852 2018-08 PDF

Full title and description

UL 852 — Standard for Safety for Metallic Sprinkler Pipe for Fire Protection Service. This UL standard sets requirements for metallic pipe intended for use in water-based fire-protection systems (sprinkler distribution and valve-trim applications), including categories by size, pressure rating, end configuration, wall thickness and corrosion-resistance characteristics with required tests and marking.

Abstract

UL 852 specifies construction, material, testing and marking requirements for metallic sprinkler pipe used in automatic and fixed water-based fire-protection systems. It defines classification by size, pressure rating and wall thickness, establishes corrosion-resistance criteria (CRR), and references installation and application guidance from NFPA standards where appropriate. The edition includes periodic revision changes; a revision change dated August 23, 2018 is recorded for this edition.

General information

• Status: Current (2nd edition with subsequent revision changes; active at the time of this product summary).
• Publication date: 2nd Edition originally published Oct. 1, 2008; recorded revision change dated Aug. 23, 2018 (Change 08/18).
• Publisher: Underwriters Laboratories (UL).
• ICS / categories: 13.220 (Protection against fire) — typically aligned under fire protection / fire-fighting classifications.
• Edition / version: 2nd Edition (with amendment/change records including 07/10, 11/14, 08/18 and later maintenance entries).
• Number of pages: Edition document page count commonly listed as about 26–30 pages depending on publisher format (UL edition listings vary by source).

Scope

This standard covers metallic pipe intended for use in water-based fire-protection systems for water distribution or valve-trim applications. It applies to pipe used when installed in accordance with recognized installation standards (for example NFPA installation standards) and categorizes pipe by size, pressure rating, end configuration (threaded or unthreaded), wall-thickness designation and, for steel pipe, a Corrosion Resistance Ratio (CRR). Test methods, performance criteria and marking requirements for ensuring service suitability and identification are included.

Key topics and requirements

• Material and construction requirements for metallic sprinkler pipe (steel and other metallic types) to ensure suitability for fire-protection service.
• Classification of pipe by nominal size, wall thickness designation and pressure rating.
• End-configuration requirements (threaded vs unthreaded) and acceptance criteria for connections.
• Corrosion Resistance Ratio (CRR) definitions and testing related to long-term performance in service.
• Mechanical, dimensional and hydrostatic testing requirements; inspection, marking and documentation for traceability.
• References to applicable installation and system standards (e.g., NFPA 13 series and related NFPA documents) for in-field application and use.

Typical use and users

UL 852 is used by pipe manufacturers, fire-protection product designers, specifying engineers, contractors, testing laboratories, authorities having jurisdiction (AHJs) and procurement/specification professionals to ensure that metallic sprinkler pipe components meet recognized safety and performance criteria for use in automatic sprinkler and related water-based fire-protection systems. It informs product selection, quality control, certification and acceptance testing.

Related standards

Commonly referenced or complementary standards include NFPA installation standards (NFPA 13, NFPA 13R, NFPA 13D), NFPA 14, NFPA 15, NFPA 16, NFPA 750 and applicable ASTM/ASME material and dimensional standards (for example ASTM A53 and related steel/pipe specifications). UL 852 is part of a product family of fire-protection and piping-related standards used together for design, manufacture and installation.

Keywords

UL 852; metallic sprinkler pipe; sprinkler piping; fire protection; corrosion resistance ratio (CRR); pipe pressure rating; threaded sprinkler pipe; valve trim; NFPA; Underwriters Laboratories.

FAQ

Q: What is this standard?

A: UL 852 is the Underwriters Laboratories standard that sets safety, material, testing and marking requirements for metallic sprinkler pipe intended for water-based fire-protection systems.

Q: What does it cover?

A: It covers metallic pipe construction, classification (size, wall thickness, pressure rating, end configuration), corrosion-resistance considerations (CRR), required tests (mechanical/hydrostatic), inspection and marking needed to identify components suitable for fire-protection service. It also references recognized installation standards for system use.

Q: Who typically uses it?

A: Manufacturers, product designers, fire-protection engineers, contractors, testing labs, authorities having jurisdiction (AHJs) and specification writers use UL 852 to design, produce, evaluate and accept metallic sprinkler piping for fire-protection systems.

Q: Is it current or superseded?

A: The 2nd edition (originally published Oct. 1, 2008) remains the base edition and has recorded revision changes (including a Change recorded Aug. 23, 2018 and later maintenance entries). Sources list the standard as current with active amendment/change history; users should confirm the latest revision/redline from UL for certification and procurement decisions.

Q: Is it part of a series?

A: UL 852 is part of UL’s family of standards addressing components and systems used in fire protection and related equipment. It is commonly used together with NFPA installation standards and material specifications (ASTM/ASME) to provide complete guidance for design, manufacture and installation.

Q: What are the key keywords?

A: Metallic sprinkler pipe; sprinkler system piping; fire-protection pipe; corrosion resistance ratio (CRR); pressure rating; threaded/unthreaded ends; UL certification.