Oxygen pipeline

It shouldn’t be necessary; the bromine pipelines we use haven’t undergone any inspection procedures

Those with a maximum operating pressure (Pw) of 0.1 Mpa or higher require specific requirements, which can be found in the Regulations on Safety Supervision of Pressure Vessels

Chapter 1 General Provisions Article 1 These regulations are formulated in accordance with the relevant provisions of the Interim Regulations on the Safety Supervision of Boilers and Pressure Vessels, in order to ensure the safe operation of pressure vessels, protect people’s lives and property, and promote the development of the national economy. Article 2 The scope of application of these regulations is as follows: 1. These regulations apply to pressure vessels that meet the following conditions: (1) The maximum operating pressure (Pw) (Note 1) is greater than or equal to 0.1 Mpa (excluding hydrostatic pressure; the same applies hereafter); (2) The inner diameter (for non-circular cross-sections, it refers to the largest dimension) is greater than or equal to 0.15 m, and the volume (V) (Note 2) is greater than or equal to 0.25 m3; (3) The medium contained is a gas, liquefied gas, or a liquid whose maximum operating temperature is greater than or equal to its standard boiling point..(Note 3) 2. Chapters 3, 4, and 5 of these regulations apply to the following pressure vessels ； (1) Storage tanks or cylinder banks in boiler rooms that are not independent of mobile compressors and have a volume of 0.15 m3 or less; (2) High-pressure vessels with a volume of less than 0.25 m3; (3) Non-independent pressure vessels in cryogenic units, pressure vessels in direct-fired absorption refrigeration units, and cryogenic chambers in air separation equipment ； (4) Spiral plate heat exchanger ； (5) Air pressure tank in hydraulic automatic air supply and pressure water supply systems (towerless water supply), gas or pressure water supply (foam generation) tanks in fire protection systems ； (6) Pressure vessels for ion exchange or filtration in water treatment equipment, expansion tanks for hot water boilers ； (7) Fully enclosed vertical combined electrical apparatus (capacitor pressure vessel) dedicated for the power industry ； (8) Tire vulcanizing machines and pressure-resistant rubber molds for rubber products awaiting use. 3. These regulations apply to the safety accessories used in the aforementioned pressure vessels, such as safety valves, rupture disc devices, emergency shut-off devices, safety interlock devices, pressure gauges, level gauges, and temperature measuring instruments. 4. The pressure vessels to which these regulations apply shall include, in addition to the vessel itself: (1) the welding groove of the first circumferential weld where the pressure vessel is welded to external pipes or devices, the first threaded joint in the case of threaded connections, the first flange sealing surface in the case of flanged connections, and the first sealing surface in the case of connections using special fittings or pipe components ； (2) Pressure cover for the opening part of the pressure vessel and its fasteners ； (3) Weld joints connecting non-compressed components to the pressure vessel body. Article 3 These regulations do not apply to the following pressure vessels: 1. Ultra-high pressure vessels. 2. Various types of gas cylinders. 3. Pressure vessels manufactured from non-metallic materials. 4. Nuclear pressure vessels, auxiliary pressure vessels on ships and railway locomotives, pressure vessels used in defense or **related equipment, pressure vessels operating under vacuum (excluding jacketed pressure vessels), and devices directly heated by flames falling within the scope of various boiler safety inspection regulations (such as flue-type waste heat boilers, etc.). 5. Pressure vessels whose maximum operating pressure under normal conditions is less than 0.1 Mpa (including those that need to temporarily withstand a pressure of 0.1 Mpa or more during feeding or material handling processes, but excluding those that require short-term exposure to a pressure of 0.1 Mpa or more during processes such as disinfection or cooling). 6. Non-independent pressure-bearing components on the machine (including compressors, generators, pumps, diesel engine cylinders or pressure-bearing housings, etc., excluding drying cylinders in papermaking and textile machinery as well as auxiliary pressure vessels for compressors). 7. Shellless coil exchangers, corrugated plate exchangers, air-cooled exchangers, cooling tubes.

Inspection is required; pipes with a pressure greater than 0.1 MPa are considered pressure pipes and must be inspected.