Antistatic air duct

Introduction

a: L = 3m, the longitudinal seams more than one;
L = 5m longitudinal seams when more than 4;
L = 10m when more than two longitudinal seams
b: D = 300,400,500 mm, the circumferential seams more than two
D = 600,800,1000 circle seams when more than three
2Flange length：L1=150mm，L2=200mm
3.The bending deformation of the end ring is less than or equal to 1.2% of the original diameter, the end of the section to the duct ring line is not perpendicular of not more than 4?.br /> a:Rings at both ends at the end of lap 200mm onwards, the duct inner circumferential seams and duct installation batten intersection hanging, hanging hung between an inner one, the spacing is 2 times Day
Distance (300mm) rings securely installed, seamless style.
b: L = 3 m or 5 m, the rings mounted reversing duct does not exceed 1/24th of the circumference of a circle 1, L = 10 m, the amount of twist rings mounted to the circumference of the duct does not exceed 1/16.
5.Ventilation Performance
a: air duct drag one thousand meters, kilometers, air leakage rate in accordance with Table 3
table3
Duct diameter mm one hundred meters Drag N? S2/m8 one hundred meters leakage rate%
300 ≤1728.0 ≤5.0
400 ≤410.0
500 ≤134.0
600 ≤54.0
800 ≤13.0
Note：L=10m，L=20m，L=30m，L=40m，L=50m
b: resistance to negative pressure in Table 4, the test does not produce negative pressure resistant duct disjointed, coated cloth tear, and the inner pressure of the separation, the joint opening and other anomalies. Duct diameter shrinkage in accordance with Table 4 provides:：
table4
Duct diameter mm pitch mm inner resistance to negative resistance Pa duct diameter shrinkage%
300～500 150 ≥4500 5
600～800 100 ≥4000 3
7 coated cloth duct meet MT383-1995 standard.

Shandong China Coal Industrial&Mining Supplies Group Co.,Ltd (hereinafter referred to as china coal) is a group company, which is a collection of e-commerce, machinery manufacturing, software, research and development, modern logistics of large diversified industrial group. The group has 100 million yuan registered capital , with more than 1100 employees.

China coal is a professional manufacturing base of mines support equipment, transport equipment, lifting equipment, spray equipment, drilling equipment, ventilation equipment, lifting equipment and other products, as well as research and development new product and mine construction products with advanced high technology.

In order to development of international trade , expansion overseas market, china coal established international trade branch company and import and export branch company. China coal actively expand foreign trade channels based on a good market image, brand, modern information platforms and capital protection. Based on the trading diversification strategy, the group established a chain loop trading system which is with import and export trade of the mining equipment as a core, the resources and market as the elements. China coal also formed a overseas sales team, that covers English, French, German, Portugal, Italy, Russian, Korean, Japanese, Arabic, and more than 10 language professionals to explore broader international markets on the Internet. At present, the group signed up for "china coal" trademark in the European Union, United States, Russia, United Kingdom, Taiwan, Macao, Singapore, Indonesia, Israel, and other countries, also get the right to use the trademark of the United Kingdom and Taiwan. Hundreds kinds of products such as tunnel boring machine, coal cutter machine etc. is exported more than 140 countries and regions which are the United States, Australia, Germany, Russia, Spain, France, Canada, United Kingdom, Italy, Portugal, Georgia, Austria, and Colombia. China coal is to establish long-term, broader economic and trade cooperation and strategic partnership with a number of large state-owned enterprises and customers, and won the unanimous approval of them.

China coal has succeeded in passing a number of certification systems which are ISO9001, 2008 quality management system certification, United States ANAB management system certification, United Kingdom international authoritative certification bodies UKAS quality management system certification, SGS certification (made in China), Alibaba GIS certification. She has also obtained a variety of honor which are China excellent enterprise of mechanical industry, China equipment manufacturing operation top 10 enterprises, national reputation for quality assured supplier, China credit certification system demonstration unit, national quality trustworthy product for conformity assessment, national consumer satisfaction units, China AAA level quality trustworthy enterprise and Chinese e-commerce company credit rating AAA level credit Enterprise.