84 new national and interstate standards entered into force in the beginning of February. There are documents which became effective for the first time. Now we will elaborate on them in details.
GOST R 59599-2021 «Fix and fill expanding foam in aerosol can. General specifications»
This standard is distributed on the foam applied for filling and heat insulation of gaps in attachings of building constructions, holes and gaps in places of laying of engineer infrastructure of buildings and constructions, local heat insulation of constructions while execution of construction and finishing works.
Foam is classified according to the following characteristics- functional use, type of aerosol package, operating temperature. Foam for filling of seams of mounting сconnections of translucent structures and apertures of door refers to the first type of functional use.
Temperature at which application is possible without loss of the declared characteristics of liquid and hardened foam is the following: from minus 20 ° C and above; from minus 10 ° C and above and from 5 ° C and above. Upper limit of the temperature is 35 ° C.
Aerosol cans used for foam production must withstand an overpressure of at least 1.2 MPa. Aerosol cans should not have traces of corrosion, low spots or other mechanical damages.
GOST R 59500-2021 «Clammers for seam roofs. Specifications» was another document that became effective for the first time. It covers clammers made from stainless steel by industrial method.
Clammers are a reinforcing equipment designed for concealed fastening of elements of roofing or facade covering to the base. Rolled plates are used for its manufacturing. They can be movable, stationary and for grooved seams.
Base of a clammer should have rounded corners and onboard rolling out along the perimeter of the base.
Rental should not have any defects. Uniform appearance, color and texture of the surface are required. Surface should be smooth, without bubbles, scratches, deep marks except for traces of rental.
GOST 34717-2021 «Molded side frame and bolster beam of a three-axle bogies for railway freight wagons. Specifications»
This interstate standard has become effective for the first time with a right of long-term use. It is distributed on molded side frames and bolster beams.
Frames and beams must have bearing capacity that provides static strength and safety factor of fatigue strength; withstand vertical static test load accommodation without destruction or loss of loading-carrying ability with a value not less than specified in the document to meet the reliability requirements. For example, the maximum rated static axial loading of the beam part № 216 is 1620 kN.
Castings of frames and beams should be cut off and cleaned of burns and scale. Presence of cuts, sharp edges, burrs is not allowed. Removal of these defects is carried out by mechanical methods.