Part 14 Construction, Installation, Inspection and Maintenance of High Pressure Boilers; Construction of Unfired Pressure Vessels

Repairs and repair methods not covered in this chapter may be used if acceptable to the inspector. Additional methods illustrated in Figures 14-3.19-1 and 14-3.19-2 are acceptable if performed as specified in the figures. 1. Flush Butt Welded Head With this repair, the old head s…

When riveted patches are used, they shall be designed and applied using methods acceptable to the department. Patch material shall meet the applicable requirements of section 14-3.12 of this Subpart. Anyone making a riveted repair shall furnish the department and the owner of the…

(1) Repairs to boilers shall be performed by an organization in possession of a valid National Board or New York State Repair Certificate of Authorization and/or a valid ASME Certificate of Authorization. The repair organization shall have a documented quality control program con…

Rerating of a boiler by increasing the maximum allowable working pressure (MAWP) or temperature or decreasing the minimum temperature such that additional mechanical tests are required, shall be considered an alteration and may be done only after the requirements of paragraphs (1…

Derating of a boiler by decreasing the maximum allowable working pressure may be done only after the requirements of subdivisions (b) through (d) of this section have been met. Derating may be initiated by the owner or the inspector. When a boiler is derated, an additional namepl…

(1) Alterations to boilers, with the exception of rerating, shall be performed in accordance with the National Board Inspection Code. (2) An organization holding only a National Board or New York State Repair Certificate of Authorization may do alterations provided the design cha…

Except as provided in subdivision (b) of this section, anyone making welded repairs or alterations in accordance with these rules shall furnish the department with a report of every welded repair or alteration. The report shall be signed by the authorized inspector who inspected …

If, in the opinion of the inspector, a hydrostatic test is necessary, the test shall be applied at a pressure of at least the set pressure of the lowest safety valve or safety relief valve, but not to exceed 150 percent of the maximum allowable working pressure. In lieu of a hydr…

Preparation of welding procedure specifications and the conducting of tests of procedures and welders shall be the responsibility of the party undertaking repairs or alterations. Before repairs or alterations are started, the inspector shall examine the written welding procedure …

Any person undertaking repairs or alterations shall have available at the job site a copy of such person's welder's qualification traceable to a supporting weld procedure specification and procedure qualification record of same. These documents shall be made available to the auth…

A repair of a defect, such as a crack in a welded joint or base material, may not be made until the defect has been removed. A suitable nondestructive examination method shall be used to assure complete removal of the defect. If the defect penetrates the full thickness of the mat…

Wasted areas in stayed and unstayed shells, drums and headers may be built up by welding provided that in the judgment of the authorized inspector the strength of the structure will not be impaired. Where extensive weld build-up is employed, the authorized inspector may require a…

Any boiler that was operated in New York State prior to January 1, 1918, or any boiler changing location within the State may be reinstalled provided an “Application for Permission to Install a Second-Hand Boiler” is filed with the commissioner and permission is granted for reins…

The boiler shall be thoroughly inspected internally and externally and a hydrostatic pressure test shall be applied if required by the inspector. If the boiler is found to be safe, a certificate of inspection shall be issued.

A heater for either liquid fuels or other liquids harmful to the boiler shall not be installed directly in the steam or water space within a boiler.

Where an external type heater for such service is used, means must be provided to prevent the introduction into the boiler of liquid fuels or other liquids harmful to the boiler.

All boilers shall be equipped with means for conducting the products of combustion to a safe place in the outer atmosphere.

Gas-fired boilers not exceeding 100 square feet of heating surface shall be provided with a single or double cone type of hood diverter in the stack.

The material for forced circulation boilers with no fixed steam or water line shall conform to the requirements of this Part. A permanent metal identification tag bearing the standard number shall be attached to the coil by the manufacturer. Replacement coils shall be likewise id…

(a) All tube bends must be reasonably smooth and free from injurious dinges, folds, or crimps, and the section outside the bend must be free from any injurious deformations of the tube due to the bending operation. (b) No tube to show an out-of-roundness at any point of the bend …

(a) Figure 14-9.1 illustrates some of the acceptable types of tube attachments. Such connections shall be: (1) expanded and beaded as in sketches (a), (b), and (d); (2) expanded and beaded and seal welded as in sketch (c); (3) expanded and seal welded as in sketch (e); (4) welded…

(a) When two or more safety valves are used on a boiler, they may be mounted either separately or as twin valves made by placing individual valves on Y bases, or duplex valves having two valves in the same body casing. Twin valves made by placing individual valves on Y bases, or …

(a) If a muffler is used on a safety valve or safety relief valve it shall have sufficient outlet area to prevent back pressure from interfering with the proper operation and discharge capacity of the valve. The muffler plates or other devices shall be so constructed as to avoid …

(a) Safety valves shall be designed and constructed to operate without chattering and to attain full lift at a pressure no greater than 3 percent above their set pressure. After blowing down, all valves shall close at a pressure not lower than 96 percent of their set pressure, ex…

(a) To insure the valve being free, each safety valve shall have a substantial lifting device by which the valve disk may be positively lifted from its seat when there is at least 75 percent of full working pressure on the boiler. The lifting device shall be such that it cannot l…

(a) Every attached superheater shall have one or more safety valves near the outlet. If the superheater outlet header has a full, free, steam passage from end to end and is so constructed that steam is supplied to it at practically equal intervals throughout its length so that th…

(a) Every boiler shall have proper outlet connections for the required safety valve, or valves, independent of any other outside steam connection, the area of opening to be at least equal to the aggregate areas of inlet connections of all of the safety valves to be attached there…

(a) Each boiler, except forced-flow steam generators with no fixed steam and waterline, and high-temperature water boilers of the forced circulation type that have no steam and waterline, shall have at least one water gage glass. Boilers operated at pressures over 400 psi shall b…

(1) Each water-gage glass shall be equipped with a top and a bottom shutoff valve of such through-flow construction as to prevent stoppage by deposits of sediments. If the lowest valve is more than seven feet above the floor or platform from which it is operated, the operating me…

(a) Each boiler shall have three or more gage cocks located within the visible length of the water glass, except when the boiler has two water glasses located on the same horizontal lines. (b) Boilers not over 36 inches in diameter in which the heating surface does not exceed 100…

(a) Each boiler shall have a pressure gage so located that it is easily readable. The pressure gage shall be installed so that it shall at all times indicate the pressure in the boiler. Each steam boiler shall have the pressure gage connected to the steam space or to the water co…

(a) The ends of all tubes, suspension tubes, and nipples shall be expanded and flared not less than one-eighth inch over the diameter of the tube hole on all water-tube boilers and superheaters, or they may be flared not less than one-eight inch, rolled and beaded, or flared, rol…

The dial of the steam gage shall be graduated to approximately double the pressure at which the safety valve is set but in no case to less than one and one-half times this pressure.

Each boiler shall be provided with a one-quarter inch pipe size valved connection for the exclusive purpose of attaching a test gage when the boiler is in service, so that the accuracy of the boiler steam gage can be ascertained.

(1) The flanges of all valves and pipe fittings of cast iron or steel shall conform to the American National Standards accepted by ASME. Flange bolts or bolt studs shall conform to a standard accepted by ASME and the bolts or bolt studs shall extend completely through the nut. (W…

(a) Piping connected to the outlet of a boiler for any purpose, and which comes within the requirement of this Part, shall be attached by screwing, welding or other means acceptable to the ASME Code. (b) Fusion welding for sealing purposes at the juncture of bolted joints may be …

(1) Each steam-discharge outlet, except safety-valve or safety relief valves, or reheater inlet or outlet connections, shall be fitted with a stop valve located at an accessible point in the steam delivery line and as near to the boiler nozzle as convenient and practicable. When …

Provisions shall be made for the expansion and contraction of steam mains connected to boilers, by providing substantial anchorage at suitable points, so that there shall be no undue strain transmitted to the boiler. Steam reservoirs shall be used on steam mains when heavy pulsat…

Each superheater shall be equipped with at least one drain so located as to most effectively provide for the proper operation of the apparatus.

(1) A blowoff as required herein is defined as a pipe connection provided with valves through which the water in the boiler may be blown out under pressure, excepting drains such as are used on water columns, gage glasses, or piping to feedwater regulators, etc., used for the pur…

(a) A bottom blowoff cock shall have the plug held in place by a guard or gland. The end of the plug shall be distinctly marked in line with the passage. (1) The blowoff valve or valves and the pipe between them and the boiler shall be of the same size except where a larger pipe …

(1) On all boilers, except electric steam boilers having a normal water content not exceeding 100 gallons, and those used for traction and/or portable purposes, when the allowable working pressure exceeds 100 psi, each bottom blowoff pipe shall have two slow-opening valves, or on…