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GB/T 13906-92 Determination of nitrogen oxides in air quality
GB/T 13906-92 Air Quality -- Determination of Nitrogen Oxides
This Standard GB/T 13906-92 specifies a method for determining nitrogen oxides in normal atmospheres. It is applicable to the determination of the concentration and transformation rate of nitrogen oxides in the atmosphere.
The main pr......
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GB 13438-92 Argon cylinder valve
Nitrogen cylinders
Nitrogen gas cylinders are containers which hold nitrogen for use in various industrial and commercial applications.
Nitrogen is a colourless and odourless gas, which is more abundant in the Earths atmosphere than any other element, comprising 78% of the air. Nitrogen is non-to......
GB 13550-92 5A molecular sieve and its test method
GB 13550—92 5A Molecular Sieve and Its Test Methods
Molecular sieves are crystalline metal aluminosilicates with a large internal pore surface and high selectivity for molecules or compound substances. The particles are mainly composed of silicon-aluminum oxides, and the pores on their surface a......
GB 15322-94 Technical requirements and test methods for combustible gas detectors
GB 15322-94 Combustible Gas Detectors Technical Requirements and Test Methods
It is most important to detect combustible gases in various industrial production processes, such as chemical and petrochemical industries, power plants, military radar and other related areas. GB 15322-94 Combustible G......
GB 16669-1996 General Technical Specifications for Carbon Dioxide Fire Extinguishing Systems and Components
General Technical Requirements for Carbon Dioxide Fire Extinguishing Systems and Components
This standard was developed by the National Fire Standards Working Group and issued in 1996 by the Ministry of Public Security of the People’s Republic of China. This standard is applicable to the general......
GB1230-05 Test method for aerodynamic performance of fans (3)
Test method of air dynamic performance of GB1230-05 fans
1. Introduction
GB1230-05 fans are used to improve the air quality in the indoor environment by providing the air movement, circulation and ventilation. The GB1230-05 fans are widely used in industrial, commercial, agricultural and reside......
Introduction to ISO Standards
International Organization for Standardization (ISO) is an independent, non-governmental, international organization that develops standards, definitions, and specifications to help promote quality and compatibility in global trade. The organizations primary role is to promote the exchange of good......
ZBJ76012-89 Air Separation Equipment Palladium Catalyst Acceptance Technical Conditions
89 Air Separation Equipment Palladium Catalyst Acceptance Technical Conditions
1. General
1.1 Palladium catalysts are usually used in air separation equipment of 89 industry, so the technical conditions for acceptance must be paid attention to. This paper discusses related technical conditions f......
Welding process parameters for diffusion welding of different metals (or alloys) (1)
Welding Parameter of Diffusion Welding for Different Metals or Alloys
Diffusion welding is one of the most popular and commercially used processes involved in joining two pieces of metals or alloys. The diffusion welding process involves the use of a pressure, heat, and atmosphere to make a form ......
Common legal units of measurement
Metric units are units of measurement that use the international system of units (also known as the metric system). Common metric units include grams for mass, meters for length, and liters for volume.
Grams measure mass, which is the measurement of the amount of matter in an object. Grams are us......
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