Bore hoses

The liquid acquires a high charge by flowing through a filter, rough-bore hose, or other obstruction. 

Part of the pipeline (or gutter) between buildings is replaced for a distance of about 1 m by narrow-bore hose of about 10 mm dia. Any explosion will be quenched at this point, because within pipes of this diameter nitroglycerine cannot readily detonate. 

PTFE is by far the material of choice, however, ETFE is also sometimes used. Carbon-filled PTFE is often used where static discharge is desired. Although hoses are available in sizes up to 8" (20 cm), the most common size is 1" (2.5 cm) with 2" (5 cm) occasionally encountered. Smooth bore hoses are used where residual liquid is a safety or environmental concern. However, smooth bore lacks the flexibility that a convoluted bore provides. Although metal overbraiding is commonly used, elastomeric ones are also encountered. 

Water and brine pumps may be isolated with flexible connectors. For small-bore pipes, these can be ordinary reinforced rubber hose, suitably fastened at each end. For larger pipes, corrugated or bellows connectors of various types can be obtained. In all cases, the main pipe must be securely fixed close to the connector, so that the latter absorbs all the vibration. Flexible connectors for the refrigerant usually take the form of corrugated metal hose, wrapped and braided. They should be placed as close to the compressor as possible. 

Suction hose in which the fabric plies are built on to a wire helix, the wire being exposed in the bore. 

Hoses produced by this method are generally used for comparatively low pressure applications, and are often produced in lengths of up to 500 metres, with a bore size of up to 40 mm. 

This component consists of a housing with two fittings for the hose connections to the pressure sensor and to the lower suds container. The inner volume of the component is divided by an elastic membrane with a weight in the middle. A bore in the weight allows for the exchange of air between the chambers. Measuring of the water level is not affected because the bore always allows for pressure compensation. 

Nozzle pressure is the optimum pressure needed to form an effective stream. Fog type nozzles typically operate at 100 psi, although some models are designed to operate at lower pressures. Hand-held solid bore nozzles typically operate at 50 psi. Solid bore master streams can operate at pressures as high as 80 psi. Pressures that exceed these values will make hose streams less effective in putting out the fire. 

Two hose lines are being operated from the same pumper at a fire. One line has a fog nozzle, is 200 ft. long, and has 25 psi of friction loss per 100 ft. of hose. The second line has a hand-held solid bore nozzle, is 400 ft. long, and has 10 psi of friction loss per 100 ft. of hose. Which of the following statements is correct ... 

Figure 1. Not drawn to scale. (A) 29/26 joint (B) hose connection (C) water jacket (D) 40 nun Kim-flow fritted disk, size 40-C (coarse), Lab Glass LG28280 (E) Teflon Stopcock 2-nun plug bore, Lab Glass LG9605T.

The laboratory should be equipped with a conveniently accessible safety shower and an eyewash fountain there should be more than one of each in a large laboratory. Increasingly, the fixed type of eyewash fountain is being superseded by a spray nozzle at the end of an extensible hose there should be one of these on each laboratory bench. In lieu of such devices—or in addition to them—2- or 3-ft lengths of rubber hose (not small-bore pressure tubing) attached with wire or clamps to water faucets are certainly better than nothing. 

This is the business end, a 2-inch diameter bore, helium around it. Those hoses carry purified water in to get the heat out. Over here are water-cooled cables that supply the current. Halfway down the structure, the maximum field occurs. 

Two modern methods developed by Nitro Nobel in Sweden arc depicted in Figs 107 and 108. Portanol (Fig. 107) is a pneumatic ejector developed for the efficient charging of AN-FO made from ammonium nitrate prills. It is based on the ejector principle, that is. the blasting agent is sucked from the container and blown tluougJi a hose into the bore-hole,... 

A insulated hose, B 3/8" OD straight tubing, C 1" OD evacuable sheath, D evacuation valve, E 1" OD "bored through" Swagelock tube to 1 MPT adapter, F 1" FPT VAC service port, G 1" OD "bored through" Cajon UltratorrCjO tube to 1" MPT adapter, H flexible bellows immersion probe. 

---