ASME 2344-1:2007 pdf download Use ofSand Cast Aluminum Alloy A356.0, T6 Temper, for the Manufacture of Hot Water Heating Boilers Under Part HC Section IV
Inquiry: May aluminum alloy A356.0 sand castings inthe T6 temper meeting the chemical composition andmechanical properties given in Tables 1 and 2 and otherrequirements of ASTM B 26/B 26M-97 be used in SectionIV, Part HC,construction of heating boilers?
Reply: It is the opinion of the committee that aluminumalloy A356.0 sand castings in the T6 temper meeting thechemical composition and mechanical properties given inTables 1 and 2 and other requirements of ASTM B 26/B26M-97 may be used in Section IV,Part HC,constructionof heating boilers,under the following conditions:(a) No welding is permitted.
(b) In lieu of Section IV,HC-200 through HC-213,allapplicable requirements of ASTM B 26/B 26M-97 andTables 1 and 2 of this Case shall apply. The footnotesapplicable to Tables 1 and 2 of ASTM B 26/B 26M-97apply to Tables 1 and 2 of this Case.
(c) Maximum water temperature shall be 200°F(95°C)(d) All other applicable parts of Section IV shall applyexcept except HC-401 and HC-402. In lieu of proceduresof HC-410,the assembled boiler may be hydrostaticallytested at 2% times the maximum allowable working pres-sure, provided the test pressure does not exceed 1% timesthe design pressure of the next limiting part. If 2% timeshydro exceeds 1% times the design pressure of any part ofthe completed vessel, then the 2% times test is only per-formed on the casting, and the assembled boiler must betested at 1%
(e) Proof testing to establish design pressure is requiredand shall comply with HG-501 and HG-502.3,except thatin the equation in HG-502.3, the specified minimum tensilestrength at room temperature shall be 34,000 psi (235MPa)and the design factor shall be 7 in lieu of 5.(f) All boiler parts or sections shall be built accordingto the Material Specification requirements. Each boilersection,including end and intermediate cored sections,shall show the following data cast in letters or numeralsat least in. (8 mm) high:
(1) the Material Specification identification number(2) the boiler or parts manufacturer’s name or accept-able abbreviation,preceded by the words“Certified byor“Cert. by”
(3) maximum allowable working pressure(4) maximum water temperature(5) pattern number6)casting date(7) the name of the shop-assembler in possession ofa Code Symbol Stamp and a valid Certificate of Authoriza-tion. Arrangement of the data shall be substantially asshown in Fig.l. Other data may be cast on the sections.(g) When the boiler size and number of sections hasbeen decided,the completed boiler shall be marked withthe Code Symbol shown in Fig.HG-530.1 and with thedata specified in HG-530.2(b).
(h) This Case number shall be shown on the H-5 DataReport.