Part 2. EXISTING INSTALLATIONS STEAM BOILERS  


Section 408.4201. Existing steam boilers.
Section 408.4202. Age limit of nonstandard existing steam boilers.
Section 408.4203. Age limit of lap seam boilers.
Section 408.4205. Lap seam crack.
Section 408.4206. Age limit of standard existing boilers.
Section 408.4207. Factors of safety.
Section 408.4208. Portable boilers.
Section 408.4210. Cast-iron headers and mud drums.
Section 408.4212. Maximum allowable working pressure.
Section 408.4214. Safety and safety relief valves.
Section 408.4215. Number of safety valves.
Section 408.4216. Safety valve connections.
Section 408.4217. Safety valve discharge pipes.
Section 408.4218. Safety valve capacity.
Section 408.4219. Safety valve pressure setting.
Section 408.4220. Safety valves on connected boilers of different pressures.
Section 408.4222. Safety valve setting on boilers with direct feed.
Section 408.4223. Determining safety valve capacity.
Section 408.4225. Replacement of safety valves.
Section 408.4230. Means of boiler feeding.
Section 408.4232. Introduction of feedwater into boilers.
Section 408.4235. Feed valves required.
Section 408.4236. Feedwater temperature.
Section 408.4240. Water column connections.
Section 408.4241. Gauge cocks.
Section 408.4242. Pressure gauges.
Section 408.4244. Stop valves.
Section 408.4246. Blowoff connections; existing power boilers.
Section 408.4251. Existing hot water boilers.
Section 408.4253. Hot water boilers included; exempted.
Section 408.4255. Working pressure and temperature; hot water steel-plate boilers.
Section 408.4257. Working temperature; cast-iron hot water boilers.
Section 408.4258. Washout openings; other than cast-iron boilers.
Section 408.4259. Washout openings; cast-iron boilers.
Section 408.4260. Furnace access openings.
Section 408.4263. Threaded connections.
Section 408.4265. Minimum distance required between boiler and floor.
Section 408.4267. Minimum size access door in a boiler setting.
Section 408.4268. Feedwater connections.
Section 408.4269. Oil heaters.
Section 408.4270. Provisions for thermal expansion in hot water systems.
Section 408.4272. Minimum capacity of closed-type tank.
Section 408.4274. Internal parts subject to deterioration.
Section 408.4277. Connections for relief valves.
Section 408.4278. Relief valves.
Section 408.4280. Lifting devices.
Section 408.4281. Material of seats and disks of relief valves.
Section 408.4283. Relief valve size.
Section 408.4284. Relieving capacity required.
Section 408.4286. Relief valve connections.
Section 408.4287. Shutoff valves prohibited.
Section 408.4288. Area of and support of relief valve discharge pipes.
Section 408.4290. Marking of safety or relief valves.
Section 408.4291. Indirectly heated hot water supply tanks.
Section 408.4292. Pressure or altitude gauges.
Section 408.4293. Thermometers.
Section 408.4294. Temperature combustion regulators.
Section 408.4296. Bottom blowoffs or drain valves.
Section 408.4298. Jacketed boilers.