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GB/T 15263-94 Determination of Total Hydrocarbons in Ambient Air by Gas Chromatography
GB/T 15263-94 Determination of total hydrocarbon in ambient air by gas chromatography
The determination of total hydrocarbons in ambient air is a measure of the particulate matter that bares the potential to be harmful to health. In order to determine the hypothesis and verify quantitative levels......
1047 
Sophie
GB3216-89 Test methods for centrifugal pumps, mixed flow pumps, axial flow pumps and vortex pumps (2)
Centrifugal, Mixed Flow, Axial Flow and Vortex Pump Test Method GB/T3216-89
Intro
This article outlines the test methods for centrifugal, mixed flow, axial flow and vortex pumps according to GB/T3216-89. The objective of the test is to measure the performance characteristics of the tested pump t......
GB 12463-90 General Technical Conditions for Transport Packaging of Dangerous Goods
1 Introduction
The General Technical Conditions for the Packaging of Hazardous Goods for Transport of China (GBT 12463-90) applies to all kinds of dangerous goods packaging for transport by road, rail, sea or air between the Peoples Republic of China and other countries or regions. It was formula......
GB 13076-91 Periodic Inspection and Evaluation of Dissolved Acetylene Gas Cylinders
GB13076-91 Dissolved Acetylene Gas Cylinders Periodic Inspection and Assessment
GB（GuoBiao）13076-91 dissolved acetylene gas cylinders periodic inspection and assessment is the industry standard of the Peoples Republic of China, indicating the requirements and procedures of dissolved acetylene g......
GB/T467-1997 cathode copper
GB/T467-1997 Anode Copper
This standard specifies the requirements and methods of test for anode copper manufactured by electrorefining process.
Anode copper is used in various products and materials including motor windings and bus bars, conductors and cables, electrical connectors, etc.
This ......
GB/T7445-1995 pure hydrogen, high-purity hydrogen and ultra-pure hydrogen
GB/T 7445-1995 Hydrogen, High Purity Hydrogen and Ultra-high Purity Hydrogen
1 Scope
This standard specifies the requirements, sampling and chemical and physical testing of hydrogen, high purity hydrogen, and ultra-high purity hydrogen.
2 Normative References
The following documents are essent......
Effect of Shielding Gas Composition on Chemical Composition and Intergranular Corrosion Resistance of 18-8Ti Steel Weld
Abstract
The effect of gas protection composition on the chemical composition and intergranular corrosion resistance of 18-8Ti welds was investigated in this paper. The welding operation was performed using the TIG welding process with different gas protection composition, such as argon–carbon d......
Common faults and elimination methods of safety valves
Fault and Solution to Common Safety Valve
Safety valves are widely used in industrial and civil purposes to protect machinery or systems from potential harms and accidents. The most frequent types are safety relief valves, pressure safety valves, back pressure safety valves and vacuum safety valv......
QC/T 694-2002 Diesel/compressed natural gas dual fuel engine specification
1 Introduction
In recent years, it has become increasingly important for many industries to make use of dual-fuel engines as a means of reducing their operation costs. Dual fuel engines are a hybrid system of two types of power sources, namely diesel and natural gas. In this system, one fuel acts......
Maintenance of pump mechanical seal
Maintenance of Mechanical Seals on Pumps
The mechanical seal is an indispensable and important part of the pump. It is necessary to correctly grasp the maintenance of mechanical seal in order to effectively improve the service life of pump and reduce cost.
In order to better maintain the mechan......
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