The H finned tube developed by our company is the latest heat transfer element in the world.
The H finned tube has the advantages of compact structure and high heat transfer efficiency. For the coal-fired boiler, the H finned tube also has the characteristics of corrosion resistance and ash reduction.
The H finned tube has a very broad development prospect for coal-fired boilers.
H-type (square) finned tube (finned tube) specifications: 32*4 32*5 38*4 38*5 42*5 48*5 51*5 51*6, etc., we can produce pipe diameters: 25~65, wall thickness greater than 3 mm;
H type (square) finned tube (finned tube) material: carbon steel, stainless steel, ND steel, alloy steel and so on.
The twin H finned tubes are being manufactured by our company.
H-type fin tube, also known as H-type fin tube, H-type fin tube, also known as butterfly tube, it is two pieces of steel with arc in the middle symmetrically welded together with the smooth tube to form fins (fins or butterflies), the front shape is quite like the capital letter "H", so it is called H-type fin tube (H-type fin tube).
The two fins of the H finned tube are rectangular, approximately square, with a length of about 2 times that of the light tube. It is an extended heating surface. Flash resistance welding technology is used for H-type finned tube. The weld fusion rate is high, the tensile strength of weld is high, and the heat conductivity is good. H-type finned tube can also be made into double-tube "double-h" type finned tube. Its structure is rigid and can be used in the case of long tube row.
Spiral fin tube is an efficient heat transfer element. Its heat transfer area is several to several dozen times as large as that of light tube, which can enhance heat transfer, reduce flow resistance and metal consumption, thus improving the economy and operational reliability of heat exchange equipment. At present, spiral finned tubes have been widely used in various boilers.
Specification for spiral finned tube (fin tube): Phi 16~ 106, wall thickness greater than 2mm;
Spiral finned tube (finned tube) material: carbon steel, stainless steel, ND steel, alloy steel and so on.
ASTM A249/A249M Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser tubes
ASTM A268/A268M Standard specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service
ASTM A269/A269M, ASME SA269/SA269M Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service
ASTM A 270 Specification for Seamless and Welded Austenitic and Ferritic/Austenitic Stainless Steel Sanitary Tubing
ASTM A312/A312M, ASME SA312/SA312M Specification for Seamless and Welded Austenitic Stainless Steel Pipes
ASTM A 358/A 358M Specification for Electric-Fusion-Welded Austenitic Chromium-Nickel Alloy Steel Pipe for High-Temperature Service
ASTM A409/SA409 Welded Large Diameter Austenitic Steel Pipe for Corrosive or High Temperature Service
ASTM B515/ASME SB515
ASTM B516, ASME SB516,
ASTM A554 Specification for Welded Stainless Steel Mechanical Tubing
ASTM A632 Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing (Small-Diameter) for General Service
ASTM A688/SA688 Standard specification For Welded Austenitic Stainless Steel feedwater heater ‘U’ Tubes
ASTM A731/A731M Seamless and Welded Ferritic and Martensitic Stainless Steel Pipe
ASTM A 778 Specification for Welded, Unannealed Austenitic Stainless Steel Tubular Products
ASTM A789/A789M, ASME SA789/SA789M Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service
ASTM A790/A790M, ASME SA790/SA790M Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
ASTM A 450/A 450M Specificaion for General Requirements for Carbon, Ferritic Alloy, and Austenitic Alloy Steel Tubes
ASTM A530/A530M Standard Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe
ASTM A 999/A 999M Specification for General Requirements for alloy and Stainles Steel Pipe
ASTM A813/A813M Standard Specification for Single- or Double-Welded Austenitic Stainless Steel Pipe
ASTM A814/A814M Standard Specification for Cold-Worked Welded Austenitic Stainless Steel Pipe
ASTM A999/A999M Standard Specification for General Requirements for Alloy and Stainless Steel Pipe
ASTM A1016/A1016M Standard Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes
German-Standards
DIN 2463-1Welded austenitic stainless steel tubes: dimensions and masses per unit length
DIN 17455 Welded circular stainless steel tubes with general quality requirements -Technical delivery conditions
DIN 17457 Welded circular austenitic stainless steel tubes subject to special requirements
EN Standards
EN 10216-5 Welded Stainless Steel Tube
EN 10217-7 Welded steel tubes for pressure purposes - Technical delivery conditions - Part 7: Stainless steel tubes
EN 10296-2 Welded circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel
Australian Standards
AS 1528 Tubes (Stainless Steel) and Tube Fittings for the Food Industry.
JIS-Standards
JIS G 3447 Stainless Steel Sanitary Pipes
G 3448 Light Gauge Stainless Steel Tubes for Ordinary Piping
G 3459 Stainless Steel Pipes
G 3468 Large Diameter Welded Stainless Steel Pipes
G 3463 Stainless Steel Boiler and Heat Exchanger Tubes
G 3446 Stainless Steel Pipes for Machine and Structural Purposes