AS 1004.1-1998 pdf free

02-21 comment

AS 1004.1-1998 pdf free.Surface plates for metrology – Part1:Cast iron.
This part of ISO 8512 specifies requirements for rectangular or square cast iron surface plates ranging from 160 mm x 100 mm to 2 500 mm x 1 600 mm, as preferred sizes, in four grades of accuracy 0, 1, 2 and 3.
This part of ISO 8512 applies to new cast iron surface plates, cast iron surface plates in use, and those reconditioned according to their grade.
4 Nomenclature
For the purposes of this part of ISO 8512, the nomenclature shown in figure 1 applies.
5 Material
Good quality, close-grained, plain cast iron or alloy cast iron at least equal to grade 250 of ISO 185 shall be used; the material shall be sound and free from blow holes and porous patches. Minor defects in working surfaces of grades 2 and 3 only may be repaired by plugging with material of composition, similar to that of the plate.
6 Stress relief
After being cast and rough machined, all plates grades 0 and 1 and of size up to and including 400 mm x 250 mm shall be given a suitable treatment to relieve internal stresses before being finished. It is strongly recommended that larger plates of all grades be stress-relieved by similar means; however, where facilities for this purpose are not available, such plates may be stabilized by natural ageing by agreement with the purchaser.
The manufacturer shall, on request, supply the purchaser with a statement of the stress-relieving process which the plate has received.
9 Finish of the working surface
The top (working surface) of grades 0 and 1 plates shall be finished by scraping or other process which results in a surface similar to that obtained by scraping. Grades 2 and 3 plates may be finished by the same processes or by machining.
The bearing area shall be not less than 20 % for grade 0, 15 % for grade 1 and 10 % for grades 2 and 3. High spots shall be uniformly distributed and the percentage of bearing area should not be so high as to cause wringing.

Download It Now Download Here
AS NZS 60598.2.17:2019 AS pdf free download

AS NZS 60598.2.17:2019

AS NZS 60598.2.17:2019 pdf free.Luminaires Part 2.17: Particular requirements—Luminaires for stage lighting, television and film studios (outdoor and indoor). 17.7.2 The luminaires for certain types of high-intensity discharge lamp, where an explosion risk is declared by the lamp manufacturer, shall incorporate a device to prevent immediate access to the lamp after switching-off or shall be marked in accordance with the...
AS NZS 4859.1:2018 AS pdf free download

AS NZS 4859.1:2018

AS NZS 4859.1:2018 pdf free.Thermal insulation materials for buildings Part 1: General criteria and technical provisions. 2.1 GENERAL This Section provides performance criteria and technical provisions for materials to be used in the thermal insulation of buildings and building services. In addition to this Section the insulating material shall— (a) meet packaging and labelling requirements of Section 3; (b) where...
AS NZS 2442.2:2021 AS pdf free download

AS NZS 2442.2:2021

AS NZS 2442.2:2021 pdf free.Performance of household electrical appliances一Rotary clothes dryers Part 2: Energy efficiency labelling requirements. Section 2 Test requirements, calculations and algorithms for the energy rating label 2.1 General This Section sets out the test requirements, equations and procedures br calculating values of the comparative energy consumption (CEC), and star rating, which appear on an energy rating label....


Anonymous netizen Fill in information