Longda has a complete set of manufacturing and testing equipments ,which are the most Advanced in the technical tube industry .Meanwhile ,we have established an effective quality management system with strong execution. We manufacture and control the products in accordance with ASTM (American Society of Testing Materials) & ASME(American Society of Mechanical Engineers) standards. 1.Copper & Copper Alloys Tube ASTM B75 ,ASTM B111,ASTM B359,ASME SB75,ASME SB111,ASME SB359 Chinese Standard : JB/T 10503, GB/T 19447 ,GB/T 17791,GB/T1527,GB/T 8890 DIN EN12451,DIN EN12449, EN12452, EN10204 2.Carbon Steel Tube: ASTM A179 ,ASME SA179 ,ASTM A498 3.Stainless Steel Tube :ASTM A213 ,ASTM A268 ,ASTM A803 4.Titanium & Titanium Alloy Tube :ASTM B338, ASTMB861,ASME SB338 ,ASME SB861, GB/T 3624, GB/T 3625, EN17861 Fin Tube Material Fin Tube Material China GB ISO EN UNS JIS Copper TP2 Cu-DHP CW024A C12200 C1220 Copper TP1 Cu-DLP CW023A C12000 C1201 Admiralty Brass HSn70-1 CuZn28Sn1As CW706R C44300 C4430 Aluminum Brass HAl77-2 CuZn20Al2As CW702R C68700 C6870 Copper Nickel 90/10 BFe10-1-1 CuNi10Fe1Mn CW352H C70600 C7060 Copper Nickel 90/30 BFe30-1-1 CuNi30Mn1Fe CW354H C71500 C7150 Carbon Steel Tube 10 - E215 A179 STB340 Stainless Steel 06Cr19Ni10 - X5CrNi18-10 304 SUS304 Stainless Steel 06Cr17Ni12Mo2 - X5CrNiMo17-12-2 316 SUS316 Titanium Alloy TA1 - TI1 GR1 - Titanium Alloy TA2 - TI2 GR2 - Range of Available Dimensions Product Category Material Plain End Finned Dimensions Condenser Tube C12200,C12000 C44300,C68700 C70600,C71500 A179 OD (mm) End WT (mm) Finished Fin OD (mm) Norminal Wall under Fin (mm) Fin Height (mm) FPI ☆ ☆ ☆ 16 1.0 15.80 0.58 0.80 50 ☆ ☆ ☆ 16 1.05 15.85 0.60 0.80 50 ☆ ☆ ☆ 16 1.15 15.85 0.65 0.85 50 ☆ ☆ ☆ 19 1.0 18.90 0.60 0.80 50 ☆ ☆ ☆ 19 1.06 18.90 063 0.85 50 ☆ ☆ ☆ 19 1.10 18.90 0.65 0.90 50 ☆ ☆ ☆ 19 1.20 18.90 0.72 0.90 50 ☆ ☆ ☆ 25.4 1.15 25.30 0.65 0.90 50 ☆ ☆ ☆ ☆ 16 1.20 15.85 0.75 0.80 50 ☆ ☆ ☆ ☆ 19 1.20 18.85 0.75 0.85 50 ☆ ☆ ☆ ☆ 16 1.20 15.85 0.78 0.80 50 ☆ ☆ ☆ ☆ 19 1.20 18.90 0.78 0.80 50 Product Category Finned Dimensions (Continue) Condenser Tube Nominal Outside Surface Area( m2/m) Actual Outside Surface Area( m2/m) Ridge Number Norminal Ridge Height Nominal Inside Surface Area(m2/m) Actual Inside Surface Area( m2/m) 0.050 0.23 20 0.30 0.044 0.048 0.050 0.23 20 0.30 0.043 0.048 0.050 0.235 20 0.35 0.040 0.048 0.060 0.278 24 0.30 0.053 0.064 0.060 0.278 24 0.30 0.053 0.070 0.060 0.28 34 0.35 0.052 0.072 0.060 0.28 38 0.35 0.052 0.075 0.080 0.39 54 0.35 0.072 0.116 0.050 0.23 20 0.30 0.040 0.0478 0.060 0.275 34 0.30 0.052 0.072 0.050 0.23 20 0.30 0.040 0.0478 0.060 0.275 38 0.30 0.052 0.072 Application & Advantage High Performance Condensing Tube It is important to enhance the condenser heat transfer performance by either enlarging the heat transfer surface Area or increasing the heat transfer coefficient. In a condenser ,heat is transferred from the hot ,high-pressure refrigerant vapor to relatively cool water inside the tube .This reduction in the enthalpy of refrigerant vapor causes It to condense .It changes from vapor to liquid condensate,and is further subcooled before leaving the condenser. The traditional low fin tube is quite effective compared with the bare tube in increasing the heat transfer surface area and in enhancing the condensate drainage . In addition ,our condenser tube is further enhanced 3-5 times by applying staggered  serrated  fin profiles to the exterior surface.It makes the condensate on the outside surface become more turbulent,which enhances the “Gregoring” effect and also improves  the convection heat transfer of the condensing liquid film substantially.On the other hand ,the special 3D configuration improves the surface tension effect of the condensate which facilitates the drainage of condensing liquid flow from the fin tip to the helically arranged fin root channel.Additional inner ridges have further enhanced the overall thermal performance since they have further enhanced the overall thermal performance since they have increased heat transfer surface area and cause more turbulent flow in tube side.