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    Home > Chemicals Industry > China Chemical > 5 coal industry standards will come into effect on May 1

    5 coal industry standards will come into effect on May 1

    • Last Update: 2021-11-30
    • Source: Internet
    • Author: User
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    The Ministry of Emergency Management recently approved and announced 22 emergency management industry standards, which will come into force on May 1, 2021


    The main technical changes in the standard of polymer materials for water shutoff in coal mines include: supplementing and perfecting the qualification method for flash point, modifying the anti-aging performance indicators, modifying the requirements and test methods for water quality impact, and deleting the requirements and tests for bonding strength methods


    Coal rock reinforcing main technical standard polymer materials change coal comprising: modifying the maximum reaction temperature, increases the oxygen index, the product removed by coal, rock classification, modify the intensity of performance indicators


    The main technical changes of the polymer foam material standard for coal mine filling and sealing include: the dimensional stability requirements and test methods have been deleted, the oxygen index detection method and judgment rules have been refined, and the flame retardancy index and the flame retardancy index have been added.


    The General Safety Technical Specification for Polymer Materials for Coal Mine Reinforcement, Water Shutoff, Filling and Spraying has clearly stipulated the flash point and harmful substance limit of each liquid component of the polymer materials used in coal mine reinforcement


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