U Bend Astm A688 Tube Feedwater Heater Tubes - China

ASTM A688/A688M Standard Welded Austenitic Stainless Steel Feedwater Heater Tubes 1 - ASTM A688/A688M Scope 1.1 This specification 2 covers welded austenitic stainless steel feedwater heater tubes including those bent, if specified, into the form of U-tubes for application in tubular feed-water heaters.

1.2 The tubing sizes covered shall be 5/8 to 1 in.

[15.9mm to 25.4mm] inclusive outside diameter, and average or minimum wall thicknesses of 0.028 in.

[0.7mm] and heavier.

1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard.

Within the text, the SI units are shown in brackets.

The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other.

Combining values from the two systems may result in nonconformance with the specification.

2 - ASTM A688/A688M General Requirements 2.1 Material furnished to this specification shall conform to the applicable requirements of the latest published edition of Specification A 1016/A 1016M unless otherwise provided herein.

3 - ASTM A688/A688M Materials and Manufacture 3.1 The tube shall be made from flat-rolled steel by an automatic welding process with no addition of filler metal.

3.2 After welding and before final heat treatment, the tubes shall be cold worked either in both the weld and base metal or in the weld metal only.

The method of cold work may be specified by the purchaser.

When cold drawn, the purchaser may specify the minimum amount of reduction in cross-sectional area or wall thickness, or both.

3.3 Many surface contaminants may have detrimental effects on the high-temperature properties or corrosion resistance of tubing.

Contamination by copper, lead, mercury, zinc, chlorides, or sulfur may be detrimental to stainless steel.

The manufacturer shall employ techniques that minimize surface contamination by these elements.

4 - ASTM A688/A688M Workmanship, Finish, and Appearance 4.1 Tubing purchased to this specification is intended for use in heat exchangers, and will be inserted through close-fitting holes in baffles or support plates, or both, spaced along the tube length.

The tube ends will also be inserted into very close-fitting holes in a tube sheet and expanded and may be welded therein.

The tubes shall be able to stand expanding and bending without showing cracks and flaws, and shall be finished reasonably straight and suitable for the intended purpose.

4.2 The residual chloride salt contamination of the inside and outside surface of the tubing at the time of packing for shipment from the mill shall not exceed a concentration of 1 mg/ft² [10.7 mg/m²] of the tube surface.

One tube in each of five hundred pieces shall be checked immediately before packing for shipment for chloride salt contamination by a procedure agreed upon by the manufacturer and purchaser.

Company Contact:

• Posted By: Shanghai T.S. Industrial Co.,Ltd

• Phone: 8615607960723

• Address: No.2, Lane 1588 Youyi Road, Shanghai , China

• Email:

• Website: https://www.lordfintube.com

• Business Description: Shanghai T.S. Industrial Co., Ltd focuses on Finned Tubes, Fin Tube, and Finned Pipe used in Heat Exchangers, Boiler Economizers, Coolers, and Heaters.
  
  We supply custom fin tubes and finned pipes in various material configurations that will increase the heat exchangers' heat transfer rate and reduce operating costs.
  
  With an advanced high-frequency resistance welding finned tube production line, an annual production capacity of up to 4000 tons, the specifications of phi 22-273mm finned tube, according to national standards or customer requirements standard production.
  
  The company produces finned tubes (square fin tube, circular finned tube, spiral fin tube, H type finned tube, longitudinal fin tube, corrugated fin tube, spiral serrated fin tube, needle-shaped fin tube, plate-shaped fin tube, inner fin tube) that can be applied to the boiler, air preheater, etc.
  
  Fin tubes or called finned tubes are a major component for various heat recovery systems.
  
  The close connection between the Finning operation and the manufacturing plant allows significant savings in packaging and freight as well as working capital reduction as a result of a “just-in-time” supply chain.
  
  T.S. Industrial Supply and produce to custom requirement finned tubes.
  
  For high-frequency resistance welding finned tube.
  
  The fin, either solid or serrated, in carbon, alloy, or stainless steel is helically wound around the tube and resistance welded.
  
  For Extruded Finned Tube, the Base tube can be carbon steel, alloy Tube, and stainless steel, while the fin can be aluminum and copper alloy.
  
  Typical product, we also produce extruded serrated finned tubes.
  
  For Bending, We can be on the bare tube and also can be over the fin, is performed on-site with custom-designed duplex benders.
  
  In our typical finned tube supply range, we supply both extruded fin tubes and helical welded finned tubes, which are mainly used for the heat transfer industry.
  
  Specific types such as Embedded Fin Tube also called G Type Fin Tube, L Fin Tube, LL Finned Tube, KL Finned Type also call knurled Finned Tube, Extruded Fin Tubes, Extruded Serrated Fin Tube, Square Fin Pipe also call H Fin Tube, Rectangular Fin Pipes also called Double H Fin Tube, Longitudinal Finned Tubes, Studded Tube and Nailhead Pipe, High-Frequency Welded Serrated Fin Tube, High-Frequency Welded Solid Fin Tube.
  
  T.S. Industrial privately owned company and finned tube manufacturer.
  
  We are not owned by, nor do we own, any steel producers.
  
  Our independence from steel producers ensures that we are objective in matching exact customer needs in terms of quality, specifications, and delivery.
  
  T.
  
  S Industrial provides finned pipes products and services to the power plants, petrochemical industries, boiler & heat exchangers, nuclear stations, paper, shipbuilding sectors as well as refrigerating industries.
  
  Incorporated with manufacturers and fabricators in China, we can supply in accordance with most international standards with high-qualified and cost-effective products.
  
  Our main strength lies in the heat exchanger tubular, especially finned tubes, which can be long up to twenty meters, and usually delivered in U-bent form.
  
  We are confident that our expertise in this field will bring you high-value-added products & services, and we are ready anytime to team up with your finned tube solutions.