We have established ourselves as reputed enterprise developing high quality 3D Hologram. With help of the advanced technology, we are presenting the best quality 3D holograms featuring lasting brightness and service life. These chemical resistant holograms are derived from a 2D image which is placed multiple times as thin optical layers. Developed under strict quality supervision, the industry compliant 3D holograms can be ordered from us in stock prints and customized graphics at a competitive price. 3D Hologram Label Sticker,3D Hologram Stickers,3D Hologram Label Stickers,3D Hologram Label Shenzhen Tuteng Anti-Counterfeiting Co., Ltd. , https://www.holographicsticers.com
General rules for valves and piping
1, when the fire pump outlet pipe diameter greater than 300mm, should not use a single manual opening and closing function of the valve. Valve should have a clear sign of opening and closing, remote control valve should have a quick opening and closing function, and sealed and reliable. 2, normally open or normally closed valve should be set locking device, the control valve and the need to open and close the valve should be set to open and close the indicator. Participate in the remote control gun linkage control system control valve, the opening and closing signal should be transmitted to the system control room. 3, dry powder valve on the valve should be used, the diameter must be consistent with the pipe diameter. 4, the pipeline should be made of corrosion-resistant materials or the outer wall of the pipeline for anti-corrosion treatment. 5, in the use of foam liquid, foam mixture or sea water pipe appropriate location should flushing interface. At the top of the pipe that may trap air, an automatic vent valve should be provided. 6, after the proportion of foam mixing device should be set aside the test interface.