how to produce copper alloy bi-metal bronze flange

Solder Bronze Flange PN16 & Class 150

• Description：Solder Bronze Flange PN16, Bronze Flange/Bronze Class 150 Female NPT Solder Companion Flange,Lead Free & low lead Bronze with thread connection type.
  The bronze fittings is sand casting.The inside is hollow. and blasted the surface by steel sand.Then the CNC machines used to process the sweat end.
  Runde bronze fittings' quality is same as yorkshire bronze fittings ,pegler bronze fittings,connex bronze fittings and kembla bronze fittings.Our Gunmetal fittings of solder bronze flange PN16 & class 150 meet EN1092 and ASME B16.5 .The gunmetal flange's size of socket end is confirmed with ASME B16.22,The thread meet ISO228 and 7-1 as well as ASME B1.20.1. if have thread.
  

• Production Standard: 
  1.BS EN 1092-3:2003 Flanges and their joints — Circular flanges for pipes, valves,fittings and accessories, PN designated —Part 3: Copper alloy flanges
  2.ASME B 16.5-2003 CLASS 150-ASME FLANGE
  

• Material: 
  Bronze Part:
  1.CC491K(Cusnzn5pb5-C)(Cu 83-87% Ni≤2% P≤0.1% Pb≤6% Sn 4-6% Zn 4-6% Al≤0.01 Fe≤0.3% S ≤0.1% Sb≤0.25% Si≤0.01%)
  2.CC499K(Cusnzn5pb2-C)(Cu 84-88% Ni≤0.6% P≤0.04% Pb≤3% Sn 4-6% Zn 4-6% Al≤0.01 As≤0.03% Bi≤0.02% Cd≤0.02% Cr≤0.02% Fe≤0.3% S ≤0.04% Sb≤0.01% Si≤0.01%)
  3.C83600(CU84-86%,SN4-6%,PB4-6%，AL≤0.005% ,NI≤1% ,ZN4-6%，FE≤0.3%,S≤0.08% ,P≤0.02% ,SI≤0.005)
  4.C84400(CU78-82%,SN2.3-3.5%，PB6-8%，7-10% ,AL≤0.005% ,FE≤0.4% ,NI+CO≤1%,SB≤0.25%,S≤0.08% ,SI≤0.005%,P≤0.02%)
  5.C89844(No Lead)(CU83-86%,SN3-5%,PB0%,AL≤0% ,NI0% ,ZN7-10%,FE≤0.3%,S≤0.08%,P≤0.05% ,SI≤0.005,SB0.2%)
  
• Application: Industrial or Residential Water and plumbing,drinking supply,cold and hot water supply, heating supply, fire protection,gas supply, industrial petroleum pipeline system etc.Suit Medium:Cold Water, Hot Water, Compressed Air, Gas, Oil Etc.