Document 8RXyaV7qmaGEVD37KGL72zg5a

More PRACTICAL IDEAS. Weft pa ddttrf ! traded area tvi/t BO lt| in the Most Prominent Buildings ~ BBT WATER TEMPERATURE CONTROL In Boston's Famous Landmark WBQNQt Blistered tubes repeired like these will soon foil BIGHT: Remove blistered sections and 'wtndorr-wsfd1 < Window Welding Can Save Your Blistered Boiler Tubes Doilsr tubes often fail end boiler must bo taken out of service quickly. . Here are some causes ol tube (allure: (1) scale or heavy sludge on tube well (2) oil adhering to tuba (3) ooot blower out of line, steam impinges on lube (4) plugged tube (3) flaw in tuba (6) bad previous weld. Repair-by window welding is quick, economical, and it's a permanent repair. Ruptured, bulged or thin tubes have been repaired temporarily, as shown, but they will fall again. Repairs fail sooner or later from (1) localised welding stresses (2) cracks forming between. weld heads or (3) weld making metal double thick, thus keeping away cooling effect of water. Window welding U easy and as quick as these temporary repairs. First cut out damaged tube section. II tube has scale or oil blister, there's usually a smaller blister a short distance from failure. Cut out smaller blister also. After all damaged areas are cut out, square off tube end and grind to 9(kdegree angle on inside, ell around. Cut new piece of tubing to exact length ol piece removed from tube. Grind each end of this re placement piece If you could weld each boiler tube completely around outside, while you are inside a boiler, no window would be needed. Rut other lubes are usually too near. So cut a so-called window on replacement sections at ends. Then eut out "window," or cut oB^j piece so replacement piece can welded. First, eut out a half circle!^ about 2-Inch radius end about thirds of tube's circumference in d ter. This opening gives plenty of r 4o weld Inside tube, two-thirds t way around. Now set wedge-ehaped a dow in place snugly and weld solid (ram]] outside. After damaged tubing is cut out udl cause of failure found, treat boiler * scale or oil Is removed before pltclagi boiler in service. That means lorblabgj all remaining tubes and dessaUai! drums, or boiling out boiler with esostto'.i| solution to remove harmful oil. Dill Davis Chicago, fU. MUTUAL LIFE INSURANCE COMPANY etmoiM Woter Hooters, six of which are shovn below; 21 Shower Oaths; 7 Dishwashers In (he company cafeterias; Photostat Develop ing Dsibs for rwo large photostat machines ... all are regulated by various types of POWERS Thermostatic device* especially suited for their particular use. When problems of temperature control oritc phone or write POWERS nearest of fice. With over 60 years' experience anti a complete line of controls, some of which pro shown below, wc can help you find the right solution for your requirement*. CllP-ON CAP of pollen con Is punched with hole. Solder metallic hosa in ploce 'No Spill* 0)1 Container We use srscuL grades of lube oil from 1-gallon cans. Machines are oiled by squirt-type oil cans or small, pressure oil-guns. But (tiling small oil cans from 1-gallon can isn't easy. Photo shows how we solved problem. Clip-on cap of gallon can is punched with hole in center. Solder a email- bore, flexible, metallic hose in place. It's easy to tilt can and guide narrow stream of oil Into a small container. 01) supply is cut Off quickly when hose end is bent upward. And you don't re quire hole for air entry to take place of oil removed because only a little oil is drawn oil at one lime. When punching hole In cap, apply punch on eoncove side to keep from damaging snap-on cap. When gallon can is empty, place cap with Its hose on a new can for more service. C T Dower London, England ,C!opptt '-"VM Composition' Stop Noisy Cheek Valve Insert a composition disk--time *' used on water end of hot-waier pump-. Take cfapper out and drill 3/16-lfl. hel* in center. Make %-in.-ihlck disk, satP* site as clapper. Setew clapper on with 3/16-In. stud and lock washer. It do** the trick. Have one ready for replace meet *o repairs sre not held op. E R Rosa Detroit, Midi. (Continued on page 152} RIANT OPERATION AND MAINTENANCE SECTION POW |( , Croat S Fergvton, Ardiltorti KcCatrtt A SutiJvofl Co., Ptbg. tnglneeni M. Abort* A Co., Contractor tuorkef A Co, Weafleg Snqlneert A Cwsfrerton ... t rpWEIS TKottU`!* . IOwim; MK'rr.J.'Mv'AiiW'-.. POWERS REGULATOR COMPANY* sQKit, iu. . 0i< THElilobllshcd In 1B91 OCTOBER 1933