Bids Are invited for Repair, Maintenance, And Installation Of Plant/ Systems/Equipments (Version 2) - Onboard In Ships And Submarines; Rate Contract For Services Of Helium Leak Checks For Underwater Systems Of In Ships And Submarines For A Period Of

Sharing tender

Bids Are invited for Repair, Maintenance, And Installation Of Plant/ Systems/Equipments (Version 2) - Onboard In Ships And Submarines; Rate Contract For Services Of Helium Leak Checks For Underwater Systems Of In Ships And Submarines For A Period Of Two Years; Service Pr.. - Services For In Ships: Helium Leak Checks Of Underwater Devices Sniffing Mode : Fill The Device To Be Leak Tested With A He/Nitrogen Gas Mixture To About 2 Bar (Higher Is Better) And Then Cover It With Plastic For 8 Hours.Then One Pierces The Plastic With A Sniffer Probe Attached To The He Leak Detector, Allowing Us To Sniff Leaks Down To 10^-6 Torr L/Sec.Once Overall Leak Is Found, The Plastic Cover Is Removed And Sniff All Joints. This Is A Lengthy Procedure Because One Must Wait At Each Point To Gather Enough He Coming Out Which Is The Standard Procedure. , Services For In Ships: Helium Leak Checks Of Underwater Devices Spray Mode (Vacuum Mode) : This Technique Is Much More Sensitive, Reaching 1X10-9 Torr L/Sec.The Device To Be Leak Tested Is Pumped Down Using A Turbo/Rotary Pump Combination To Reach A Vacuum Better Than 10^-3 Torr (A Better Vacuum Yields Better Results)Once Base Vacuum Is Reached The System Is Connected The Helium Leak Detector. Now, Helium Is Sprayed Very Fine To All Joints Which Indicate Where Leak Is And How Much Is The Leak. , Services For In Submarine: Helium Leak Checks Of Underwater Devices Sniffing Mode : Fill The Device To Be Leak Tested With A He/Nitrogen Gas Mixture To About 2 Bar (Higher Is Better) And Then Cover It With Plastic For 8 Hours.Then One Pierces The Plastic With A Sniffer Probe Attached To The He Leak Detector, Allowing Us To Sniff Leaks Down To 10^-6 Torr L/Sec.Once Overall Leak Is Found, The Plastic Cover Is Removed And Sniff All Joints. This Is A Lengthy Procedure Because One Must Wait At Each Point To Gather Enough He Coming Out Which Is The Standard Procedure. , Services For In Submarine: Helium Leak Checks Of Underwater Devices Spray Mode (Vacuum Mode) : This Technique Is Much More Sensitive, Reaching 1X10-9 Torr L/Sec.The Device To Be Leak Tested Is Pumped Down Using A Turbo/Rotary Pump Combination To Reach A Vacuum Better Than 10^-3 Torr (A Better Vacuum Yields Better Results)Once Base Vacuum Is Reached The System Is Connected The Helium Leak Detector. Now, Helium Is Sprayed Very Fine To All Joints Which Indicate Where Leak Is And How Much Is The Leak.