522 CMR, National board, ASME Questions and Answers 2023

522 CMR, National board, ASME Questions and Answers 2023 What does section 1 of the ASME code cover? • The rules for construction of power boilers. • electric boilers. • miniature boilers. • and high temperature hot water boilers to be used in stationary service and includes those boilers used in locomotives, portable and traction services. What is the scope of section 1 of the ASME code? Section 1 applies to the boiler proper and to the boiler external piping. What is boiler external piping? • The boiler external piping, It includes all the piping from the boiler proper, up to and including the second stop valve and free blow drain. • Section 1 of the ASME code. What are the 6 section 1 ASME code symbols? {S} Power Boiler. {M} Miniature Boiler. {E} Electric Boiler. {A} Boiler Assembly. {PP} Pressure Piping. {V} Safety Valve. What are the Section 8 ASME code symbols? {U} Pressure vessels. {UV} pressure vessels safety valve. How long are the ASME stamps good for? 3 years Through what organization is a A stamp required? ASME What is meant by a Nondestructive Test of a welded joint? • A test which does not destroy the boiler component. Name 5 Non Destructive tests recognize by section 1? • Radiographic. • Ultrasonic. • Magnetic Particle. • Liquid Penetrant. • Eddy Current. • Visual. • Hydrostatic What is stress? • The internal resistance a material offers to being deformed by an external force. • External force: Would be the boiler pressure. • Internal force: Would be the ability of the boiler plate to resist being torn apart. Name the 3 stresses boiler components are subjected to? • Tension. • Compression. • Shear. What is tension? • Tension: When 2 forces of equal intensity are acting in opposite directions the material is said to be in tension. What is Compression? • Compression: When 2 forces of equal intensity act towers the center the material is said to be in compression. What is shear • Shear: 2 forces of equal intensity acting in the same plane, In very much the same way as a pair of scissors or shears, The material is said to be in shear. What is the difference between a blister and a bulge on a boiler shell? • Blister: Deformation of part of the thickness of a boiler plate or shell, caused by local overheating Of an area containing a laminaination. • Bulge: Deformation of boiler plate or tube, caused by overheating and the action of the pressure, that affects the full thickness of the material. What is considered an adequate purge? • 8 volume air changes is considered an adequate purge. • by section VII. What is a ligament? What is a pitch? • Ligament: Metal between holes drilled in a drum. • Pitch: Center to center distance of tube holes or stays, distance from thread crest to thread crest. How many gauge glasses are required on a boiler? For pressures less than 400 PSI: • At least one direct-reading gauge is required. For pressures 400 PSI and above: • Two direct-reading gauges, • Or one direct-reading gauge, and two remote-reading gauges, are required. What is the minimum feed pump discharge pressure? • Each feedwater supply source must be capable of supplying water to the boiler at a pressure 3% above the highest set safety valve. •ASME Code requirements When is more than one safety valve required? Steam boilers having more than 500 SQ FT of heating surface require 2 or more safety valves. What is the Water column & Gauge Glass piping size? • The minimum pipe size of the water column connection is 1 inch. • The water column must be fitted with a minimum 3/4 inch blowdown valve. • Gauge glass connections to the water column must be at lest 1/2 inch. • Minimum pipe size of the gauge glass blowdown line 1/4 inch. What are the requirements for the blowdown piping on a boiler? • Boilers with MAWP exceeding 125 PSI must have extra heavy piping. • Minimum blowdown pipe size of 1 inch. • Maximum blowdown pipe size of 2½ inches. . Seamless extra heavy steel What are the requirements for the blowdown piping on a boiler? • The blowdown pipe must be protected from the heat according to the code. • The blowdown piping thickness must be equal to the feed piping. What are the requirements for the blowdown valves on a boiler: • Boiler over 100 PSI must have 2 blowdown valves. • Boilers with MAWP exceeding 125 PSI must have extra heavy valves What does the ASME code states about 2 boilers connected to a common header? When 2 or more boilers are connected to a common header, the connection from each boiler having a manhole opening shall be fitted with 2 stop valves having an ample free blow drain between them. What is the purpose of the water column? The water column slows down the turbulence of boiler water so an accurate reading of the water level in the gauge glass can be obtained. What type of valve should have the water column? • Valves used between the boiler and water column, must be OS&Y valves, or lever type valves, that indicates their position whether they are open or closed. • The valves should be locked in the open position. Water column lines: Lines going to the Water column should be fitted with cross tee's for inspection and cleaning. Tubular vs flat gauge glass pressure requirement: •Tubular gauge glass are used up to 250 PSI. • Flat gauge glass are used for pressures over 250 PSI. Flat gauge glass may be used for pressures up to about 2,200 PSI. When is an R-1 form used? • The R-1 form is a report of welded repair by the National Board inspection code (NBIC) • Filed for standard code repairs. Who is required to prepare the R-1 form? • The organization responsible for the repair of a boiler or pressure vessel shall prepare the R-1 form. What is an R-2 form? • A report of alteration issued by the National Board inspection code (NBIC). Where can you find an R-1 and R-2 form? • You can download the form from the National Board website. • What set of regulations pertain to pollution laws in Massachusetts? • 310 CMR. • Section 7. • Air Pollution Control. What are the material requirements for a repair or alterations by the ASME Code in section 2? Carbon or alloy steel having a carbon content of more than 0.35% shall not be welded. What size are the letters in the repair nameplate? The letters in the nameplate should be at least 5/16 inches high. What is repair? • Is the work necessary to restore a boiler or pressure vessel to a safe operating condition. • Provided there is no deviation from original design.