ANSI/CAN/STANDARD FOR SAFETY Flexible Metallic Hose

标准状态

基本信息

标准简介

ANSI/CAN/UL 536:2021 STANDARD FOR SAFETY Flexible Metallic Hose1 Scope1.1 These requirements cover flexible metallic hose supplied with fittings on each end that facilitateconnection without twisting the hose. They have a corrugated metal core or a nonmetallic inner core whichare covered with a stainless steel braid.They have a nominal inside diameter of not more than 4 in (101mm) intended for use in piping systems carrying compressed gases, such as anhydrous ammonia, andcombustible fuel gases such as natural gas， liquefied petroleum gas, propane,and butane, at pressuresnot exceeding 500 psig (3.45 MPa) and temperatures not greater than 450 °F(232 C) or lower than-40 °F(-40°C).1.2Flexible metallic hose is intended for aboveground applications and for underground applications notinvolving contact with soil.1.3 Flexible metallic hose is not considered a substitute for standard pipe or tubing and its use should beconfined to applications where flexible connections cannot be avoided.1.4 Flexible metallic hose is not intended to be subjected to excessive torsion, tension, compression,orbending stresses and shall be protected against physical damage and ignition sources.1.5 This standard

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