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BPVC-IV_Interp_Stnd-56_2005

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  SECTION IV Subject Interpretation File No.Acceptable Coupling Use Under Section IV Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV-04-07 BC04-168HG-301.2, Tube Thickness Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV-04-08 BC04-1222HG-701.1, Mounting Safety and Safety Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV-04-09 BC04-1222Introduction/Preamble and Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV-04-11 BC05-537Use of Hot Water Supply Boilers as Water Heaters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV-04-06 BC04-1365Table HF-300.1 [Note (19)] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV-04-10 BC04-1366  Interpretation: IV-04-06 Subject: Use of Hot Water Supply Boilers as Water HeatersDate Issued: January 14, 2005File: BC04-1365Question (1): Does the term “hot water supply boiler” as used in Section IV mean that it is a potablewater heater?Reply (1): No.Question (2): May an “H” stamp boiler be installed as a commercial potable water heater?Reply (2): This is beyond the scope of Section IV.Question (3): Does Section IV prohibit an “H” stamp boiler from having direct contact with potablewater?Reply (3): No. Interpretation: IV-04-07 Subject: Acceptable Coupling Use Under Section IV ConstructionDate Issued: January 28, 2005File: BC04-168Question: Does Section IV prohibit the use of mechanical pipe couplings with elastomeric seals in theconstruction of heating boilers?Reply: No, provided the couplings meet the requirements of HF-203. Interpretation: IV-04-08 Subject: HG-301.2, Tube Thickness RequirementsDate Issued: January 28, 2005File: BC04-1222Question: Is it permissible to use tubes with a minimum wall thickness that meets requirements perHG-301.1, with additional wall thickness on the tube ends that meet the added 0.04 in. thickness requiredby HG-301.2, for rolled tubesprovided all engagement with thetubesheet or head occurswithin the boundaryof the thicker portion of the tube ends?Reply: Yes.  Interpretation: IV-04-09 Subject: HG-701.1, Mounting Safety and Safety Relief ValvesDate Issued: January 28, 2005File: BC04-1222Question: Must the safety/safety relief valve(s) be mounted on the outlet piping of a coil or header typeboiler?Reply: No, the safety/safety relief valve(s) may be mounted either on the outlet piping or outlet end of a coil or header type boiler. Interpretation: IV-04-10 Subject: Table HF-300.1 [Note (19)]Date Issued: April 15, 2005File: BC04-1366Question: Section II, Parts A and D reference the 1992 Edition of SA/CSA-G40.21 that year date of thespecification lists metric grades 260W and 300W and does not contain equivalent imperial unit grades 38Wand 44W that were listed in the prior and subsequent editions of CSA-G40.21. Section IV, Table HF-300.1[Note (19)] lists SA/CSA-G40.21, grades 38W and 44W as acceptable substitutes for SA-36/SA-36M inSection IV Construction. Is it permitted for metric grades 260W and 300W, as listed in the 1992 Editionof CSA-G40.21, be used in lieu of SA-36/SA-36M for Section IV Construction?Reply: Yes. Interpretation: IV-04-11 Subject: Introduction/Preamble and ScopeDate Issued: June 15, 2005File: BC05-537Question: Can a boiler be designed and stamped per Section IV when heated/fired with reciprocating orturbine engine exhaust gas only?Reply: Yes, provided all requirements of Section IV are met.

Sachin Who

Jul 28, 2017
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