BS Specifications

There is no entirely satisfactory way of measuring flow. In the BS 2782 flow cup test an amount of moulding powder is added to the mould to provide between 2 and 2.5 g of flash. The press is closed at a fixed initial rate and at a fixed temperature and pressure. The time between the onset of recorded pressure and the cessation of flash (i.e. the time at which the mould has closed) is noted. This time is thus the time required to move a given mass of material a fixed distance and is thus a measure of viscosity. It is not a measure of the time available for flow. This property, or rather the more important length of flow or extent of flow, must be measured by some other device such as the flow disc or by the Rossi-Peakes flow test, neither of which are entirely satisfactory. Cup flow times are normally of the order of 10-25 seconds if measured by the BS specification. Moulding powders are frequently classified as being of stiff flow if the cup flow time exceeds 20 seconds, medium flow for times of 13-19 seconds and soft flow or free flow if under 12 seconds. [Pg.650]

It will be noted that the materials covered by the BS specifications fall into several distinct groups, sometimes with apparently small differences within the group. Characteristics which could influence the selection of the most appropriate material for a specific application are tabulated in Table 4.1 for wrought products, but some elaboration is desirable since the successful utilisation of aluminium begins with the selection of alloy. Additionally, mention should be made of materials not covered by the BS General Engineering series. [Pg.656]

Major causes for coating failure are surface cracking and undetected pinholes or voids. These can be repaired and serious problems avoided. Coatings generally fail in different modes, these are chemical failure, abrasion failure, adhesive failure, cohesive failure and undercoat corrosion. For performance evaluation of coatings on experimental basis on these parameters various ASTM and BS specifications are presently being used. [Pg.197]

The materials handled in the bins are 20% solid by weight and have a flow of 2.9 tons of water per hour and 178 litres/minute of pulp. The size of the material is 100 to over 325 BS specification mesh. Maximum acid concentration is 20% hydrochloric acid. The temperature in the system is 60 °C. A 6 mm thick natural rubber lining of shore hardness 50 on the Shore A scale is used to protect the equipment against the abrasive environment as well as the corrosion effects of hydrochloric acid. [Pg.38]

A number of specifications and codes of practice are followed throughout the world for rubber lining, the major ones being from the ASTM, the BS Specifications, the German Institute for Standardisation (DIN) and the Japanese Industrial Standards (JIS) which give exhaustive information on rubber lining procedures, testing methods and code of practice. [Pg.125]

Lloyd RV, Wilson BS. Specific endocrine tissue marker defined by a monoclonal antibody. Science. 1983 222 628-630. [Pg.203]

Brightness BS- -Specific Gravity 2.4 Bulk Density (lbs/ft3) 53 Mean Particle Size (microns) 25-30 Retained on 325 zwsh (%) n/a Processing Teziperature (C) >320 Chemical ... [Pg.269]

One of the primary objectives of production operations is to deliver product at the required rate and quality. Therefore the product quality specification and any agreed contract terms will drive the activities of the production operations department, and will be a starting point for determining the preferred mode of operation. The specifications, such as delivery of stabilised crude with a BS W of less than 0.5%, and a salinity of 70 g/m, ... [Pg.279]

Only lead alloys containing copper below 0.08% have practical appHcations. Lead sheet, pipe, cable sheathing, wine, and fabricated products are produced from lead—copper alloys having copper contents near the eutectic composition. Lead—copper alloys in the range 0.03—0.08 wt % copper are covered by many specifications ASTM B29-92 (7), QQL 171 (United States), BS 334, HP2 Type 11 (Canada), DIN 1719 (Germany), and AS 1812 (Austraha). [Pg.60]

In the United States creosote specification AWPA PI/89 is intended for the treatment of timber for land and fresh-water use, and the heavier grade AWPA P13/89 for the preservation of marine piling and timber. In the United Kingdom a British Standard Specification, BS. 144/90, Part 1, specifies three grades of creosote two for pressure impregnation and one for bmshing appHcation. The standards of the West European Institute for Wood Preservation (WEI) are often used in Europe. [Pg.346]

Size Analysis. ASTM and BS (18) provide a number of methods dealing with the size specifications and size analysis procedures including D197, D410, D311, and D431. [Pg.233]

Rotating electrical machines Specific requirements for turbine type synchronous machines BS EN 60034-3/1996 ... [Pg.192]

Specifications for intrinsically safe electrical system i General recommendations on the selection of the appropriate group of electrical apparatus based on safe gaps and minimum igniting currents 3682/1991 BS 5501-7/1977 BS 5501-9/1982 BS 5345-1/1989 ... [Pg.192]

Specification for the insulation of bars and coils of high voltage machines, including test methods - BS 4999-144/1987... [Pg.228]

Specification for high-voltage fuse-links for motor circuit applicatiojis — BS EN 60644/1993... [Pg.319]

Specification for elecirosiaiic hand held spraying equipment for non flammable material for painting and finishing BS EN 50059/1991 ... [Pg.418]

Application Guide for voltage transformers Specification for voltage transformers General requirements 4201/1991 4146/1991 BS 7625/1993 BS 7629/1995... [Pg.452]

Specification for high voltage busbars and busbar connections 8084/1992 BS 159/1992... [Pg.453]

Power transformers. Specification for insulation levels and dielectric tests 2026-1 and. 3/1991 BS 171-3/1993 -... [Pg.495]

Specification for cunent transformers General requirements Measuring current transformers 2705 part-1/1992 part-2/1992 BS 7626/199.3 ... [Pg.495]

Rotating electrical machines Specific requirements for turbine type synchronous machines Specification for voltage regulation and parallel operation of a.c. synchronous generators — BS F.N 60034-3/1996 BS 4999-140/1987... [Pg.530]

Specification for 600/1000V and 1900/3300 V armoured electric cables having thermosetting insulation Fire resisting characteristics of electric cables Performance requirements, sample and lest conditions - BS 5467/1997... [Pg.549]

Specification for LV switchgear and controlgear. Switches, disconnectors, switch-disconnectors and fuse-combination units I.3947-.3/1993 BS EN 60947-.3/1992... [Pg.773]

Low voltage switchgeai and controlgear as.semblies Specification for type-tested and partially type tested as.semblies 8623-1/1993 BS EN 60439-1/1994 ... [Pg.901]

Specification for spring washers for general engineering and automobile purposes. Metric series. 306.3/1994 BS 4464/1998 ... [Pg.912]

Specification for wrought aluminium and alun)inium alloys for electrical purposes bars, extruded round tube and. sections 5082/1998 BS 2898/1985 209-1. 2... [Pg.925]

Specification for low voltage switchgear and controlgear assemblies Particular requirements for busbars trunking systems (busways) 8623-2/1993 BS EN 60439-2/1993... [Pg.958]

Common specifications for high voltage switchgear and controlgear Standards 3427/1991 BS EN 60694/1997... [Pg.958]

BS 970 1991 Part 3 - Specification for Wrought Steels for Mechanical and Allied Engineering Purposes. London BSI. [Pg.383]

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