UL 109 2020-05 PDF
Name in English:
St UL 109 2020-05
Name in Russian:
Ст UL 109 2020-05
Original standard UL 109 2020-05 in PDF full version. Additional info + preview on request
Full title and description
St UL 109 2020-05 — UL 109: Standard for Tube Fittings for Flammable and Combustible Fluids, Refrigeration Service, and Marine Use. This document is a revision (May 20, 2020) to UL 109 (6th edition) that defines construction, materials, performance, testing, marking, and application requirements for tube fittings intended for use with designated flammable/combustible fluids, refrigerants, and certain marine fuel applications.
Abstract
UL 109 establishes safety and performance requirements for metal tube fittings used on tubing systems that carry fuel gases, refrigerants, gasoline/gasohol, diesel, heating oils and kerosene, and for fittings used in marine fuel systems. The standard specifies test procedures, materials acceptance, pressure and leakage performance, and marking/installation information to ensure safe service with flammable and combustible fluids and refrigerants.
General information
- Status: Active (UL maintained standard; 6th edition with revision published May 20, 2020).
- Publication date: Revision published May 20, 2020; original 6th edition published June 19, 1997.
- Publisher: Underwriters Laboratories (UL) / UL Standards & Engagement.
- ICS / categories: 75.060 (Natural gas / fittings and related components).
- Edition / version: 6th edition (with multiple interim changes; revision dated May 20, 2020).
- Number of pages: Approximately 18 pages (published revision document length varies by distributor/package but commonly 18 pages for the 2020 redline/revision release).
Scope
The standard covers tube fittings intended for use on tubing that carries: (a) fuel gases such as acetylene, LP-gas, manufactured and natural fuel gases; (b) refrigerants; (c) gasoline or gasohol (per ASTM/ANSI fuel specifications); (d) diesel fuel; (e) heating fuel oils; and (f) kerosene. It also includes specific provisions for fittings used in marine fuel systems. UL 109 does not cover tube fittings for many biofuels or ethanol fuels except as specifically noted. The document references NFPA and other installation codes for selection and use guidance.
Key topics and requirements
- Material and construction requirements for tube fittings used with flammable/combustible fluids and refrigerants.
- Pressure, leakage, and mechanical performance tests (including specified test fluids and procedures).
- Compatibility and suitability requirements for refrigerant service and various fuel types.
- Marking, identification, and documentation requirements for certified fittings.
- Specific provisions for fittings intended for marine fuel system applications.
- References and coordination with NFPA standards and relevant ASTM specifications for fuel and refrigerant definitions and installation guidance.
Typical use and users
Primary users include component and fitting manufacturers, product safety and compliance engineers, test laboratories, HVACR and refrigeration designers, fuel-system designers for onshore and marine applications, regulatory bodies, and procurement/specification teams who require UL certification and compliance documentation for tube fittings used with flammable or combustible fluids and refrigerants.
Related standards
UL 109 is commonly used in conjunction with relevant NFPA codes (e.g., NFPA 30, NFPA 54, NFPA 58, NFPA 302), ASTM/ANSI fuel specifications such as ASTM D4814 (gasoline), ASTM D975 (diesel), and other industry standards governing installation, storage and handling of flammable/combustible fluids and refrigerant service.
Keywords
UL 109, tube fittings, flammable fluids, combustible fluids, refrigeration service, marine use, fuel system fittings, refrigerant fittings, pressure testing, marking, Underwriters Laboratories.
FAQ
Q: What is this standard?
A: UL 109 is a UL safety standard that specifies requirements for tube fittings intended for use with flammable and combustible fluids, refrigerants, and certain marine fuel applications. It defines construction, testing, marking, and application requirements to demonstrate safe performance.
Q: What does it cover?
A: It covers fittings for tubing carrying fuel gases, refrigerants, gasoline/gasohol, diesel, heating oils and kerosene, plus specific provisions for marine fuel-system fittings; it also references installation and selection guidance from NFPA and applicable fuel specifications.
Q: Who typically uses it?
A: Manufacturers of tube fittings, safety and compliance engineers, test labs, refrigeration/HVAC designers, marine and fuel-system designers, certifying bodies, and procurement/specifiers rely on UL 109 when selecting or certifying fittings for the covered services.
Q: Is it current or superseded?
A: The 6th edition of UL 109 remains active with a revision issued May 20, 2020. Users should verify whether more recent redline changes, CSDS proposals, or revisions have been published after that date when finalizing compliance activities.
Q: Is it part of a series?
A: UL 109 is a standalone UL safety standard focused on tube fittings, but it is used alongside other UL standards and national codes (NFPA documents) and references ASTM/ANSI fuel specifications; it is maintained within UL's standards program and may have associated change notices, redlines, and CSDS proposals as part of its maintenance lifecycle.
Q: What are the key keywords?
A: Tube fittings, flammable fluids, combustible fluids, refrigeration, marine fuel fittings, UL certification, pressure testing, material compatibility.