中文字幕日韩欧美一区二区三区_欧洲一级毛片_亚洲国产精品视频_亚洲视频三区_龙珠z国语291集普通话_久久久精品456亚洲影院

Technical requirements for using cables in explosion-proof construction sites

1. Electrical circuits should be laid in areas with low explosion hazards or at a distance from the release source, avoiding places that are susceptible to mech……

How to divide the dust explosion prevention area into 20 zones, 21 zones, and 22 zones?

According to the frequency and duration of explosive dust environments, the places classified as explosive dust environments are divided into three zones. The dust layer, precipitation, and accumulation of combustible dust should be considered as "any other release source" that may form an explosive environme……

Is explosion-proof certification equivalent to intrinsic safety certification? What's the difference between them?

Sometimes customers come to inquire about Zhongnuo Testing, and they have products that require intrinsic safety certification. What is the difference between this and explosion-proof certification? This involves the issue of various types of explosion-proof certification. Actually, intrinsic safety is just one type of……

Does the whole machine still need to undergo explosion-proof certification, even though the components have explosion-proof certification?

When many clients consult, I purchase components and equipment with explosion-proof certificates. Does the overall equipment assembled together still need explosion-proof certification? What are the requirements for explosion-proof certification of the whole machine? As a professional explosion-proof certification agen……

Shenzhen Explosion proof Certificate Agency

1、 The introduction of explosion-proof certificate refers to the document used to determine whether the equipment meets the requirements of standards, type test……

Material requirements for explosion-proof enclosures of mining equipment

The explosion-proof shell material of Class 1 electrical equipment: 1. The shell of electrical equipment used in mining workfaces (including electrical dual equipment installed on coal mining machines, tunneling machines, rock loading machines, conveyors, etc.) must be made of Zhongnuo testing steel plates or cast stee……

PCEC Tianjin Explosion proof Testing and Certification Center Explosion proof Certificate Query Website

The National Safety Production Tianjin Explosion proof Electrical Testing and Inspection Center, also known as the Petroleum and Chemical Industry Electrical Product Explosion proof Quality Supervision and Inspection Center (PCEC), is a special environmental electrical equipment testing laboratory recognized by the Nat……

NEPSI Shanghai Explosion proof Electrical Testing and Certification Center Explosion proof Certificate Query Website

Shanghai Explosion proof Electrical Inspection and Testing Center National Instrumentation Explosion proof Safety Supervision and Inspection Station (NEPSI) is an international explosion-proof laboratory recognized by the International Electrotechnical Commission's IECEx system; It is the National Safety Production Sha……

CNEX Nanyang Explosion proof Electrical Testing and Certification Center Explosion proof Certificate Query Website

The National Explosion proof Testing and Certification Network is affiliated with Nanyang Explosion proof Electrical Research Institute Co., Ltd. (hereinafter referred to as Nanyang Explosion proof Electrical Research Institute) and is sponsored by Nanyang Explosion proof Electrical Research Institute (CNEX). Nanyang E……

Do explosion-proof electrical equipment still need to undergo explosion-proof acceptance after installation?

Many corporate customers are puzzled whether the electrical equipment purchased with a valid and genuine explosion-proof certificate can be used normally after installation? Of course not! Does the use of explosion-proof equipment equal the issue of overall explosion-proof? We know that every product has its own lifecy……