Regulations on cylinders

Use respirators and face protection etc. when changing regulators on cylinders of toxic gases. 

To use CNG safely, technicians and drivers need to know what the dilfeiences are and how to work with them. Other subjects that must be understood ate NG combustion and storage, working with high-pressure conduits, connectors, regulators, and cylinders, safety codes and industry standards, and recommended CNG cylinder inspections. Detailed hands-on training for installation and maintenance technicians should normally be provided by the conversion kit manufactiuers (Demirbas, 2002). 

Put regulator with attached outlet hose on cylinder and tighten GGA connection. 

All pressure regulators should be equipped with spring-loaded pressure-relief valves (see section 6.D.2.2.1 for further information on pressure-relief devices) to protect the low-pressure side. When used on cylinders of flammable, toxic, or otherwise hazardous gases, the relief valve should be vented to a hood or other safe location. The use of internal-bleed-type regulators should be avoided. Regulators should be removed from corrosive gases immediately after use and flushed with dry air or nitrogen. Mercury bubblers should not be used. 

Andrady et al. [89] patented a spinneret configuration which also operates with plenty of capillary holes. The scheme can be seen in Figure 10.12. Holes are located on cylinder superficies and the collector is also cylindrical and concentric with the spinneret. The solution can be fed into the spinneret through a conduit or even manually. The flow rate can be regulated by adjusting the rotation speed and/or the pressure within the spinneret tube. High output rates can be achieved, but the collector surface is limited or can be extended only in a complicated way. 

OSHA says at 1910.253(b)(3) that connected for use (i.e., in actual use or attached ready for use ) means that the regulator on the compressed gas cylinder is installed. 

Methanol Because of its low vapour pressure, methanol is ideal for Cl in ion trap instruments with internal ionization. Neither pressure regulators nor cylinders or a long tubing system are required. The connection of a glass flask or a closed tube containing methanol directly on to the Cl inlet is sufficient. In addition, every laboratory has methanol available. Also, for ion traps using external ionization and quadrupole instruments, liquid Cl devices are commercially available. 

Manufacture. Small cylinders of hydrogen sulfide are readily available for laboratory purposes, but the gas can also be easily synthesized by action of dilute sulfuric or hydrochloric acid on iron sulfide, calcium sulfide [20548-54-3], zinc sulfide [1314-98-3], or sodium hydrosulfide [16721 -80-5]. The reaction usually is mn in a Kipp generator, which regulates the addition of the acid to maintain a steady hydrogen sulfide pressure. Small laboratory quantities of hydrogen sulfide can be easily formed by heating at 280—320°C a mixture of sulfur and a hydrogen-rich, nonvolatile aUphatic substance, eg, paraffin. Gas evolution proceeds more smoothly if asbestos or diatomaceous earth is also present. 

The slide is located in the compressor casting below the rotors, allowing internal gas recirculation without compression. Slide valve is operated by a piston located in a hydraulic cylinder and actuated by high-pressure oil from both sides. When the compressor is started, the slide valve is fuUy open and the compressor is unloaded. To increase capacity, a solenoid valve on the hydraulic hne opens, moving the piston in the direction of increasing capacity. In order to increase partload efficiency, the slide valve is designed to consist of two parts, one traditional shde valve for capacity regulation and other for built-in volume adjustment. 

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