45°. Not sure what the cross hole would be used for, if they
are indeed hammer flare tools. Never saw any copper tubing that large that needed a flare. By the time you get that big I would think it would be time for solder or brazed joints.
dg
There are many things I have never seen, such as:
From Copper Fittings Standards:
"Flared Copper Fittings
COLD WATER SERVICE
Flared fittings for use with flared copper tube for cold water applications with a maximum water pressure of 175 psig are manufactured to the requirements of ANSI/ASME B16.26 - Cast Copper Alloy Fittings for Flared Copper Tubes.
These fittings shall be produced to meet the general requirements of ASTM B 62, Alloy C83600 or the chemical and tensile requirements of ASTM B 584, alloys C83800 or C84400. Essentially, the elemental make-up of these cast brass fittings is approximately but not exactly equal to 85% Copper (Cu), 5% Tin (Sn), 5% Lead (Pb) and 5% Zinc (Zn). ( Although other elements may be part of the Alloy structure, more detailed analysis of the Alloys can be obtained from Copper Development Association Inc from their Plumbing Section).
These flared fittings are limited in size from 3/8" nominal to 2" nominal as designated by ASTM B88 for Seamless Copper Water Tube.
Marking of these fittings is limited to the manufacturer's name or trademark and that identification may be omitted form fittings less than ½" nominal size.
(These flared fittings are normally limited to use in underground water service lines and in some rare cases above ground water distribution piping and should not be mistaken for 45° flared fittings manufactured for higher pressure applications.)
NOTE:
As additional information for flared fittings for copper tube applications it should be understood that forged or machined brass flared fittings for pressure applications are manufactured to the dimensions and configurations of SAE standards. The flare dimension and configuration for a 45 degree single flare is to be in accordance with the specifications of SAE J533"
