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©Novinium, Inc. 2016, all rights reserved. 

 

NRI 603 – Small Diameter Cables  – SPR 

Revised: February 19, 2016 

 

Page 

3

 of 

11

 

 

Slowly pressurize the feed tank to the lesser of the 

adjusted flow pressure (AFP)

 or the maximum 

working pressure rated for the tank. 

 

If the AFP isn’t known, use 

NRI 352

 

to calculate the AFP. 

 

The AFP can be increased by 10% for attended operations. However, if the injection needs to be 
left unattended for any reason, reduce the pressure to the normal level. 

 

This helps reduce the effects of any leaks that would have been found if attended. 

 

Read the pressure on both the inline gauge and tank gauge. The two readings should be close to each 
other. 

 

Check the tank for any leaks. 

 

If any leaks are found, relieve all pressure immediately and fix the leak. 

 

A pressure relief valve prevents hardware operation above the design pressure. 

Do not

 tamper 

with the pressure relief valve. 

3.

 

Receiver tanks. 

 

On the receiver end of the cable sub-segment, install an injection tool connected to an empty 
graduated flush bottle with 1/8” tubing. There are many sizes of flush bottles available. 

 

Figure 4:

 Connect a flush bottle to the receiving injection tool. 

Summary of Contents for NRI 603

Page 1: ...esidential distribution URD sized cables Setting up injection equipment Reading the liquid flow meter Calculating fluid amounts Knowing when to pin the cable to finish the injection Trademarks http ww...

Page 2: ...on 5 1 Flow check 5 2 Flush water and other fluids 5 3 Read the liquid flow meter 6 Estimating Fluids 7 1 Estimate the current supplied fluid 7 2 Estimate time for fluid arrival 8 Fluid Arrival 8 1 Fl...

Page 3: ...cure the liquid flow meter to the tank that is being used Figure 2 Liquid flow meter Figure 3 Flow meter secured on tank Connect the tank s injection port colored red to the inlet of the flow meter Co...

Page 4: ...elps reduce the effects of any leaks that would have been found if attended Read the pressure on both the inline gauge and tank gauge The two readings should be close to each other Check the tank for...

Page 5: ...re Injection Check 1 Check for leaks Before sending fluid straight to the cable make sure each part of the injection assembly is leak free If any leaks are found in the following process close all val...

Page 6: ...f the BBs are dropping rapidly there is a restriction in the cable Verify flow through the cable by checking the tubing on the receiver end of the cable Build up pressure in the line or submerge it in...

Page 7: ...ust be located above the silver BB If the BBs are reversed clearly label and contact supply chain to exchange for a new liquid flow meter The backing behind the glass tube has two scales printed on it...

Page 8: ...tes Estimating Fluids 1 Estimate the current supplied fluid Note the current fluid level in millimeters mm Subtract the current level from the starting level Figure 12 Find the starting and current fl...

Page 9: ...sh any contaminants out of the cable Continue to flush until at least 25cc of clear clean fluid comes out of the cable Figure 14 Flush the cable 2 Reduce pressure to the tailored injection pressure TI...

Page 10: ...igher voltage level follow the pressurization procedure as stated in NRI 613 Large Diameter Cables Feeder SPR Figure 15 Thin insulation compared to the conductor 1 Flow rate signals the end of injecti...

Page 11: ...even if the supplied fluid is lower than the floor The limited space in these cables might not allow enough fluid to reach the floor Pin the cable Figure 16 Liquid flow meter BBs are at 1cc min 2 Pin...

Page 12: ...essure from the tanks if they will be moved or stored for the night Open the valve on the feed tank s injection port to vent pressure and fluid from the liquid flow meter back into the feed tank 3 Att...

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