UL 2039:2016 pdf free download – STANDARD FOR SAFETY Flexible Connector Piping for Fuels.
4.6 PRIMARY CONNECTOR PIPE (Primary) — A single wall connector pipe construction intended to contain and convey the liquid flowing in a piping system under normal use. Primary pipe is intended for long term continuous contact with the liquid.
4.7 QUALIFIED PERSON — A worker specifically trained by the manufacturer to perform proper assembly and installation of its piping systems in the field in accordance with the specified instructions. The qualified person is not required to be an employee of the manufacturer.
4.8 SECONDARY CONNECTOR PIPE (Secondary) — A single wall connector pipe construction intended to surround the primary, contain the liquid under abnormal conditions (such as primary rupture), and provide fluid communication and monitoring capabilities.
4.9 SIZE (Pipe Size or Fitting Size) — Nominal or trade dimensions (inches or mm) of connector pipe and fittings based on inside diameters or thread. Note – Nominal or trade sizes may not be equivalent to the actual measurements.
4.10 SUMP — Accessible atmospheric enclosure located underground, typically below a dispenser, above a tank, or at grade between tanks and dispensers, and designed to house pipe, connections, equipment and contain spills.
4.11 SWIVEL JOINT — A connection or joint designed to allow frequent rotational movement of the pipe during normal functional use.
4.12 UNDERGROUND — Physically located below the surface layer of earth either in contact with soil and soil fluids (direct burial) or routed in a secondary or chase pipe (indirect burial).
4.13 UNION JOINT — A connection or joint designed to allow rotational movement of the pipe only during assembly, installation or maintenance.
CONSTRUCTION
5 General
5.1 Connector pipe are permitted to be constructed from any combination of materials, but shall be flexible with a bend radius of 2 ft (61 cm) or less, and shall be capable of field assembly and installation without the use of special equipment or tools.
5.2 The total connector pipe length (pipe and fittings) shall not exceed 12 ft (3.65 m). The diameter of connector piping shall not exceed standard nominal trade sizes beyond a 0.5 — 4.0 inch (1 .25 — 10.2 cm) range.
5.3 Primary pipe and the primary of a coaxial pipe shall be rated at least 50 psig (345 kPa). Secondary pipe and the secondary of a coaxial pipe shall be rated at least 50 psig (345 kPa).
5.4 Connector piping shall be supplied with end fittings that are capable of assembly to fixed pipe or fueling components, such as threaded fittings, or bolted flanges, or weld/bond joints. Moving swivel and union joints are permitted. All pipe threads shall be NPT, NPTF, BSPT, BSPP or similar common trade types. All bolts, gaskets, and other components shall be supplied with the product.
5.5 All materials used in the construction of pipe and fittings shall be suitable for their intended use locations with respect to normal (expected use within marked ratings) and abnormal (reasonable foreseeable misuse) conditions in accordance with the required performance tests described in this standard.
5.6 Nonmetallics (polymers, elastomers, ceramics, etc.) used in the construction of pipe and fittings shall be evaluated for long-term exposure compatibility to air, soil, water, ultraviolet light, and internal and external fluids within the expected ambient use temperature range for underground, sump, and/or aboveground use per 1.2.
5.7 Metallics used in the construction of pipe and fittings shall be inherently corrosion resistant (such as stainless steel, aluminum, brass), plated, or coated per 5.8, or evaluated for equivalent corrosion resistance per 5.9. All metals shall comply with all applicable requirements in this standard.