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GB 12827-91 standard reference acetylene carbon black and identification method
Carbon black refers to black powdery or granular material, which is composed of many tiny particles with the average particle size of between 10 and 2000 nanometers. It is composedot many carbon atoms buthydrophobic in nature. Carbon black can be prepared by pyrolysis of hydrocarbons such as coal ......
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Evolution of GB/T 1220 Standard for Stainless Steel Bars
GB/T 1220 Standard Evolution of Stainless Steel Bars
The history of the development of a variety of industry standards and regulations, including those related to stainless steel bars (SSBs), began nearly two decades ago, when the standard of GB/T 1220 was initiated and announced in 1998. The sta......
JB/T4750-2003 "Pressure Vessels for Refrigeration Devices" is a recommended industry standard (replacing JB6917-1998)
Pressure Vessels for Refrigerating Apparatus
This industry standard JB/T4750—2003 replaces JB6917-1998 and provides instructions for design and assessment tests for safe performance of pressure vessels for refrigerating apparatus.
1. Scope
This standard applies to pressure vessels used in the ......
JGJ81-2002 Construction Steel Structure Welding Technical Regulations (Part 8)
Welding technology regulations of building steel structures according to JGJ81-2002(part 8)
Welding of steel structures is an important part of the construction technology of steel structures. In steel structure construction, welding is used to connect steel members, building components and addit......
JGJ81-2002 Welding Technical Regulations for Architectural Steel Structures (Part 2)
Welding process is a method of joining two or more metal parts by using heat and pressure.Heat generated by electric arc, resistance or other process melts the two parts and fuses them together, and then applying pressure joins them together. Compared to other joining processes, welding is general......
JGJ81-2002 Construction steel structure welding technical specification (twenty-nine)
Steps for Welding Steel Structures According to JGJ 81-2002
Welding of steel structures is an important process in the construction and manufacturing industry. In the past, welding processes were largely undocumented and the industry relied on trial and error methods of welding that were often ti......
JGJ81-2002 Construction Steel Structure Welding Technical Regulations (Part 32)
Welding technique in architectural steel structures referred to the requirements of JGJ81 - 2002
Architectural steel structures refer to the structures of buildings, bridges, automobiles and ships constructed by metal materials. In terms of steel, it is the skeleton composed of various metal allo......
JGJ81-2002 Welding Technical Regulations for Architectural Steel Structures (Part 18)
Welding Technology Regulation (18) on Steel Structures in BuildingsJGJ81-2002
The article originates from the national industrial production standard (JGJ81-2002) for the construction of steel structures. It is about the welding technology regulation of the steel structures.
The article consis......
JGJ81-2002 Construction Steel Structure Welding Technical Regulations (Part 15)
Welding of steel structures is a major factor in the construction of buildings and most other structures. This article will outline the key points of JGJ81-2002 standard for Architectural Steel Structures Welding Technology.
The JGJ 81-2002 standard is based on the needs of various types of struc......
German general purpose forgings
Germany is one of the leading producers of forgings, heavy engineering and machining. This is due to the excellent quality of its components and the expertise of its engineers.
Forgings are used in many industries to manufacture products that require strong parts that can withstand extreme temper......
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