Walls patching holes

If it s bigger than the size of a quarter but smaller than 8" x 8", you ll need to repair the hole with an adhesive wall patch as well as drywall compound. 

Small hole in liner about 2 in. below nozzle tip. Two patches each several inches square with wall thinning of about 10 mils. 10 23 33... 

To suppress afterburn and minimize energy losses caused by in-leakage of cold ambient air, any holes in the heater walls, convective section, ducts, etc. should be patched. Also make sure that inspection ports are closed. Leaks can be detected on stream to a certain extent by visual inspection (crumbling chalk dust or dropping a little baking powder past a suspected leak will pinpoint the leak). 

Where a definitive identification of the contents of the munition is required, it will normally be necessary to breach the munition case and take and analyse a sample of the chemical fill. This is a difficult and hazardous task, and will normally be attempted only in the field, in exceptional circumstances. Techniques for safely penetrating a munition in the field have, however, been developed. One system, developed by the United Kingdom, is based on the use of a commercial nail gun to penetrate the case of thin walled munitions. A special rubber patch is first placed on the wall of the munition and the nail gun, fitted with a specially designed hardened steel pin, is clamped to the wall of the munition. The gun is set up so that it can be fired remotely, and when this is done the steel pin is driven through the rubber patch and penetrates the wall of the munition. The rubber patch reduces the risk of leakage due to any over-pressure present within the munition. Once the pin has been safely inserted, the munition is transferred to a sealed glovebox. The pin can then be carefully removed and a sample of the fill extracted via the resulting hole in the munition wall for chemical analysis. 

These kits operate on the principle of containing valve leaks by applying hoods and gaskets. For cylinders and ton containers patches are provided for sealing off a small hole in the side wall. Capping devices are provided for fusible plugs in ton containers. The kits contain step-by-step instructions for the use of the devices. The necessary tools are included, but PPE is not included. 

Nail and screw holes, along with other small punctures, can be covered over directly with drywall joint compound, aka putty, patching compound, or mud. (In a move-out pinch, you can use toothpaste on white walls to plug tiny holes. Just don t tell your landlord.)... 

ATTACH THE PLUG. Spread a thin layer of drywall patching compound on the side of the paper that lies flush against the wall and press the paper firmly to the drywall around the hole to stick the plug in place. 

A test simulating a leak in a loop was made to study this phenomenon. A 2 % Cr-1% Mo steel pipe was filled with Bi containing 1000 ppm U, 350 ppm Mg, and 250 ppm Zr. A 1 /32-in. hole was drilled in the pipe below the Bi level. A patch of asbestos tape 2 in. in diameter was put over the hole. The tube was then heated to 594°C and pressurized to 5 psi to force out a small amount of Bi. The pressure was dropped as soon as some Bi had leaked out and the tube was then heated at 594°C for 1025 hr. The appearance of the pipe underneath the asbestos tape patch and a cross section of the oxidized area are shown in Fig. 21-11. A complete oxidation through the pipe wall has occurred in the area adjacent to the leak. 

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