PN40 Flange is a rating of nominal pressure, full nominal pressure of PN have PN6 PN10 PN16 PN25 PN40 for Hyupshin Flange Supplying. Norms of DIN EN1092-1 BS4504 GOST33259-2015 and NFE29203 are have nominal pressure rating, PN40 flanges are high pressure rating and used in high pressure piping, PN40 flange thickness is bigger than PN6 PN10 PN16 PN25. PN40 Flange pn16 steel flanges manufacturer, DIN 2527 2635 PN40 flanges, EN1092-1 PN40 flanges, BS4504 PN40 Flanges, gost33259 pn40 flanges Jinan Hyupshin Flanges Co., Ltd , https://www.iflange.com
2 When the inclination angle of the ore body is smaller than the natural angle of repose of the ore, the thickness is thinner and the bottom plate is relatively flat, the pseudo-tilted working face or the fan-shaped working face can be used for propulsion, and the electric raft should be located in the patio connecting passage;
3 The angle of inclination of the ore body is greater than the natural angle of repose of the ore. When the thickness of the ore body is uneven or the floor undulation is variable, the horizontal working face should be used for propulsion; the electric raft can be located in the patio contact road;
4 When the thickness of the ore body is less than 3m , it should be promoted by reverse inclination and full thickness. When the thickness of the ore body is greater than 3m , it is advisable to adopt stratified propulsion or super-layer advancement.
What regulations should be adopted in the mining and mining method?
1 The comprehensive method of retained ore should be used for ore bodies that do not bond ore, are not self-igniting, and have a thickness of less than 8 m and an inclination of 30° to 50° ;