2.10.2
Buttwelding Fittings and Tapered Reducing Fittings
ASME B16.9, except aluminum shall be ASTM B 241/B 241M, alloy 6061-T6, of
the same weight as the pipe in which the fittings are installed.
2.10.3
Flanges
ASME B16.5, Class 150, Raised Face Type, except aluminum shall conform to
ASTM B 247M ASTM B 247, alloy 6061-T6 or alloy 356-T6.
2.10.4
Unions
ASME B16.39, Class 150, except aluminum alloy shall conform to ASTM B 247M
ASTM B 247, alloy 6061-T6 or alloy 356-T6.
2.11
WELDING FOR ALUMINUM PIPING
2.11.1
Process For Aluminum
ASME B31.3, Gas Tungston Arc Process or Gas Metal Arc Process. [Ten
percent of welds shall be examined by radiography; if 25 percent of the
radiographed welds fail, 100 percent of welds shall be examined by
2.11.2
Welding Electrodes
AWS A5.10/A5.10M, ER5356 electrodes.
2.12
GASKETS, BOLTS, NUTS AND WASHERS
2.12.1
Gaskets
ASME B16.21, composition ring 1.60 mm 0.0625 inch thick, of one piece
factory cut, resistant to the effects of aviation hydrocarbon fuels and
manufactured of fire-resistant materials. Provide full-face gaskets for
flat-face flanged joints, and ring gaskets for raised-face flanged joints.
2.12.2
Bolts
ASTM A 193/A 193M, Grade B8. Extend no less than two full threads beyond
the nut with the bolts tightened to the required torque.
2.12.3
Nuts
ASTM A 194/A 194M, Grade 8.
2.12.4
Washers
ASTM F 436MASTM F 436, flat circular stainless steel washers.
Provide
washers under bolt heads and nuts.
2.12.5
Electrically Isolating (Insulating) Gaskets for Flanges
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NOTE: Indicate locations of each electrically
isolating connection.
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Provide ASTM D 229 electrical insulating material of 1000 ohms minimum
SECTION 15194N
Page 17
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