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GB12358-90 General technical requirements for gas detection and alarm devices in the working environment
Technical Requirements of General Gas Detection Alarms in GB12358-90 Workplace Environment The main purpose of this technical requirement is to standardize the requirements of general gas detection alarms used in the workplace environment, to ensure the safety of staff and the safety of workplace......
tags: requirements product shall alarm gas device
1078
Sophie
GB50177-93 Specifications for Design of Hydrogen and Oxygen Stations
Hydrogen and Oxygen Station Design Specification Hydrogen and oxygen are the basis of many industrial and chemical processes. The presence of both the material in an appropriate quantity is crucial in maintaining the quality of products being manufactured. For this reason, it is imperative that a......
Surface Roughness Measurement
Surface roughness measurement Surface roughness measurement is the measure of the small, local irregularities on a surface that extend in a direction perpendicular to the mean plane of the surface. Rough surfaces generally have a much larger friction coefficient, which can cause health and safety r......
Characteristic Causes of Residual Shrinkage Cavity and Its Judgment and Treatment
Introduction Remaining shrinkage hole is a common defect in castings, caused by a number of possible factors related to the manufacturing process. This paper attempts to thoroughly review the causes and prevention of remaining shrinkage hole defects in investment castings, and to discuss various ......
International brand core making machine operating procedures
International P-Card Chip Operation Regulations Article I: scope This Operation Regulations are applicable to international P-Card chip operations. Article II: Definition of Terms 1. International P-Card: A card payment previously issued by the bank in a foreign country, hereinafter referred......
Angle gauge
Angle measurement is a fundamental step in the application of applied sciences. Making precise measurements of angles can enable the making of precise calculations and the solving of complex problems. One of the most common uses of angle measurements is in engineering and design projects. Measurem......
GB 6654-1996 Size, Shape, Weight and Allowable Deviation of Steel Plates for Pressure Vessels
SYNOPSIS This GB 6654–1996 specifies the dimensions, shapes, masses, and permissible deviations of steel plates used for pressure vessels. The plates that are covered by this document are those with a nominal thickness of 4.75 mm or more, and a nominal width of 600 mm or more. The characteristic......
tags: steel gbt plates steel standard pressure
1077
Sophia
GB/T 706-1988 Dimensions, shapes, weights and allowable deviations of hot-rolled I-beams
GB/T 706-1988 Hot Rolled Steel Angles Dimensions,Shape,Weight and Tolerances This GB/T 706-1988 standard specifies the size, shape, weight, and tolerance for hot rolled steel angles. Hot rolled steel angles are widely used for many applications, such as various structures and engineering projects......
tags: angles steel corner hotrolled steel sections
1051
Sophie
Manufacturing method and delivery status of seamless steel pipes for high-pressure chemical fertilizer equipment (GB 6479-2000)
GB 6479-2000 Seamless Steel Pipes for High Pressure Fertilizer Equipment Manufacture and Delivery State This standard deals with the seamless steel pipes that are used in high pressure fertilizer equipment, specifying the requirements and delivery states of the pipes. 1. scope This standard spe......
tags: steel gb pipes pipe steel seamless
1058
Aiden
GB/T 4172-2000 Mechanical properties and technological properties of weathering steels for welded structures
GB/T 4172-2000 Mechanical and Process Properties of Weathering Steel for Welded Structures This national standard (GB/T 4172-2000), Mechanical and Process Properties of Weathering Steel for Welded Structures, is a technical standard specified by the National Standardization Administration Committ......
tags: welding steel standard welding steel gbt
1122
Emily
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