PEB-17.2 In addition to the above, after assembly of the boiler pressure vessel and the mechanically assembled boiler external piping and trim, the completed electric boiler shall be given a final hydrostatic test at a pressure not less than 1 ½
times the MAWP of the pressure vessel. Miniature electric boilers that are trimmed to operate at less than the MAWP of the pressure vessel shall be given a hydrostatic test at a pressure not less than the safety valve setting.
PEB-17.3 When the electric boiler is to be marked with the “E" symbol, the symbol shall be applied after completion of the hydrostatic test of PEB-17.2.
PEB-18 INSPECTION AND STAMPING OF
BOILERS
PEB-18.1 Inspection of electric boilers shall be as required by PG-90.1 and PG-90.3. Witness by the Authorized Inspector of the hydrotest required in PEB-17.2 for the completed boiler may be omitted for electric boilers that meet all the following limitations:
(a) 800 kW maximum per vessel
(b) 600 V maximum
(c) mechanically assembled boiler external piping (BEP) only
When the Authorized Inspector does not perform a final inspection of the completed boiler, the Manufacturer or Assembler shall make an equivalent examination. The equivalent examination shall be in accordance with a quality control procedure meeting the requirements of PEB-18.2 and PEB-18.5.
PEB-18.1.1 Electric boilers exceeding the size limitations specified in PEB-18.1, and having only mechanically assembled external piping (BEP) and trim, shall have a final inspection by the Authorized Inspector, who shall also witness the hydrostatic test called for in PEB-17.2.
PEB-18.1.2 For electric boilers having welded or brazed boiler external piping (BEP) or trim, the inspection requirements of PG-90.1 and the hydrostatic test requirements of PG-99 apply.
PEB-18.2 Each electric boiler Manufacturer shall comply with the applicable requirements of PG-104 and PG-105.
PEB-18.2.1 An electric boiler Manufacturer or Assembler applying for or renewing the “E" stamp shall have its facilities and organizations subject to a joint review by its Authorized Inspection Agency and the legal jurisdiction involved (see last paragraph of PG-105.4).
PEB-18.2.2 A Manufacturer or Assembler holding an “E" stamp and assembling units where the final shop inspection is not mandatory (see PEB-18.1), shall be subject to periodic review by its Authorized Inspection Agency. The review shall be conducted on a quarterly basis or more frequently if deemed necessary by the Authorized Inspection Agency. The frequency of this review may be reduced subject to written agreement between the Manufacturer or Assembler and its inspection agency and the written approval of the appropriate legal jurisdiction. However, in no case shall the review be less than once every 6 months.
PEB-18.3 The stamping of electric boilers shall conform to the requirements of PG-106. Completed electric boilers shall be marked with the “S" or “M" symbol by the Manufacturer of the boiler pressure vessel except when the boiler pressure vessel is constructed under the provisions of PEB-3 (see PEB-18.4). When the trim, fixtures and fittings (such as valves), threaded boiler external piping, and appurtenances are connected to an electric boiler by a Manufacturer or Assembler not authorized to apply the “S" or “M" stamp, the boiler assembler shall apply an “E" stamp to the completed assembly. “E" stamp holders are limited to the use of assembly methods that do not require welding or brazing.
PEB-18.3.1 The stamping of the boiler pressure vessel shall be located as called for in PG-111.8 and need not indicate the kW input or the maximum designed steaming capacity.
PEB-18.3.2 The stamping of the complete electric boiler shall be on a separate metallic plate and shall be in accordance with PG-106.4. The MAWP shall be that established by the completed boiler assembler holding the “S," “M," or “E" stamp, but in no case higher than the MAWP stamped on the boiler shell. The MAWP shall be listed on Part II of Form P-2A, Manufacturers' Data Report for All Types of Electric Boilers. This plate shall be located on the assembly so that it is readily visible from the operating floor.
PEB-18.3.3 The stamping required by PEB-18.3.2 need not be done in the presence of the Authorized Inspector for electric boilers that do not receive final inspection by the Authorized Inspector (see PEB-18.1).
PEB-18.4 For boiler pressure vessels constructed under the provisions of PEB-3, the inspection and stamping requirements of Section VIII, Division 1, UG-116(c) for special service pressure vessels (UB), shall be followed.
PEB-18.5 Those Manufacturers and Assemblers providing an equivalent examination of completed electric boilers when final inspection is not witnessed by the Authorized Inspector (see PEB-18.1), shall provide oversight by a Certified Individual (CI).
PEB-18.5.1 A Certified Individual (CI) shall be an employee of the Manufacturer or Assembler and shall be qualified and certified by the Manufacturer or Assembler. Qualifications shall include as a minimum
(a) knowledge of the requirements of this Section for the application of Code symbols
(b) knowledge of the Manufacturer's quality program
(c) training commensurate with the scope, complexity, or special nature of the activities to which oversight is to be provided
The Manufacturer or Assembler shall maintain a record containing objective evidence of the Certified Individual's qualifications, training and certification.
PEB-18.5.2 The duties of a Certified Individual (CI) shall be to assure that each use of the Code symbol as permitted in PEB-18.3.3 is in accordance with the requirements of this Section and is documented on the Certificate of Conformance on Form P-2A, Manufacturers' Data Report for All Types of Electric Boilers. The CI shall also
(a) verify that each electric boiler, to which a Code symbol is applied, meets all applicable requirements of this Section
(b) sign the Certificate of Conformance, Form P-2A, prior to release of control of the boiler
PEB-19 MANUFACTURERS' DATA REPORT FOR ELECTRIC BOILERS
PEB-19.1 This form consists of two parts. Part I is to be completed by the Manufacturer of the boiler pressure vessel who is the holder of the “S" or “M" stamp and his inspection agency. Part II is to be completed by the Manufacturer or Assembler responsible for the completed electric boiler who shall be authorized to use any of the “S," “M," or “E" stamps.
PEB-19.2 When the boiler pressure vessel is constructed by a “U" stamp holder and certified on a U-1 or U-1A Data Report, Part 1 shall be completed by the “S," “M," or “E" stamp holder to the extent indicated in Guide A-351.1.
