UL 567-2021 pdf free download.Emergency Breakaway Fittings, Swivel Connectors and Pipe-Connection Fittings for Petroleum Products and LP- Gas.
5.11 SWIVEL CONNECTOR — A type of swivel categorized as either a hose swivel or swivel joint.
a) HOSE SWIVEL — A swivel connector with one end attached to a hose and the other end to an appurtenance. The hose swivel will allow radial movement of the hose and/or appurtenance to prevent the hose from twisting or having torsional stress.
b) SWIVEL JOINT — A swivel connector installed in a piping system with at least one end attached to a rigid pipe or other appurtenance that is firmly affixed. The swivel joint will allow radial movement of the pipe or other appurtenance attached to the swivel to prevent torsional stress.
CONSTRUCTION
6 General
6.1 A connector or fitting for use with petroleum products shall be constructed for an operating pressure of not less than 50 psig (340 kPa) for the fluid confining portion of the device and 0.5 psig (3.45 kPa) for the vapor confining portion of the device, when provided, and an ultimate rupture pressure of not less than five times the design pressure.
6.2 A swivel connector or emergency breakaway fitting for use with anhydrous ammonia or LP-Gas shall be designed for an operating pressure of not less than 350 psig (2413 kPa) and an ultimate rupture pressure of not less than five times the design pressure.
6.3 An emergency breakaway fitting shall be constructed to separate in the event that the coupling is subjected to a pull force not less than 100 lbf (445 N), and not to exceed 350 lbf (1557 N) for petroleum product service and 400 lbf (1779 N) for anhydrous ammonia or LP-Gas SerVice.
6.4 A hose assembly provided with an integral swivel connector for petroleum product service shall comply with the applicable requirements in the Standard for Hose and Hose Assemblies for Dispensing Flammable and Combustible Liquids, UL 330.
7 Materials
7.1 Materials in contact with the fluid to be handled shall be inherently resistant to being adversely affected by such fluid.
7.2 A synthetic rubber part shall not show any signs of cracking or other damage following exposure to — 40°F (— 40°C). See the Low Temperature Test, Section 22.
7.3 A part made of drawn-brass or machined from bass rod in which the zinc content exceeds 15 % shall be capable of withstanding, without cracking. the Moist Ammonia-Air Stress Cracking Test, Section 24, for copper and copper alloys.
7.4 A copper or a copper-alloy part shall not be used where it is in contact with dissimilar metals such as aluminum, unless one of the parts is coated with chromium or other equivalent metallic coating to preclude electrolytic action. A coating shall have a thickness of not less than 0.0002 in (0.005 mm).UL 567 pdf download.