Steel _ purification _ Weifang Dongye Dongye decontamination price works price offered by Weifang Dongye Steel. Decontamination Price | Weifang Dongye Steel | Shandong Weifang Dongye decontamination price Steel Engineering Co., Ltd. (www.sdjinquan.com) 2014 upgrade been newly launched air cleanliness level of standards and norms Editing economic and technological development of the country and region has its own clean air standards and normative standards Dongye decontamination prices are provisions concerning the level of cleanliness, such as the U.S., Japan, Western Europe, Scandinavia, Russia and so on. China promulgated in 1984, "clean plant design specifications" (GBJ73-84), 1996 年 the specification of a larger modifications, in 1990 promulgated the "clean room construction and acceptance" (JGJ71-90) to guide the construction and acceptance important documents. The specification re-revision. GBJ73-84 grade level of cleanliness required per cubic meter (l) the air "0.5μm dust particles per cubic meter (l) the air" 5μm dust number 100 "35 * 100 (<3.5> 1000" 35 * 1000 (<35> "250 (<0.25> 10000" 35 * 10000 (<350> "2500 (<2.5> 100000" 35 * 100000 (<3500> "25000 (<25> Science Microelectronics decontamination generally include: 1. Cleaner Production Zone 2, clean the auxiliary rooms (including personnel purify space, purification of materials with living room and part of the room, etc.) 3, the management area (including office, duty, management and rest, etc.) 4, the device area (including the air conditioning system applications, electrical buildings, houses of high water and high-purity gas, hot and cold equipment room)