Zhejiang Guanyu Stainless Steel Tube Co., Ltd  
  Directory | Useful Tool | Sitemap | Contact US | Home

         

Products

What Happens When We Bend The Tube?








Bending reduces strength due to a reduction in wall thickness. The extrados (outside radius) of the bend stretches and become thinner, while the intrados (inside radius) compresses and gets thicker. The tighter the bend, the greater reduction in wall thickness.

5050-0 temper aluminum tubing (.035 wall thickness) is used on a large number of light aircraft for wheel brake and gear retract hydraulic systems, and fuel systems.  In the "0" condition, 5052 is soft and workable. The ends are easily flared and 5052 has higher fatigue strength than most aluminum alloys.

Be careful when replacing tubing that you are using the same type of tubing that you are replacing. 5050-0 is for low pressure systems only. In some applications such as light aircraft fuel injector lines, a stronger stainless steel tubing is used. Some hydraulic systems also use tubing other than 5052-0. 

The use of aluminum alloy tubing is limited in  certain areas of airborne hydraulic systems by  MIL-H-5440. Consult the applicable drawing  or illustrated parts breakdown to determine the correct tubing for a particular system. Tubing that conforms to Federal Specifications WW-T700/ 1 and WW-T-700/6 will not be used in  hydraulic systems. 




Aluminum alloy tubing that conforms to Federal Specification WW-T-700/1 is used for general purpose lines and conduits of low or negligible fluid pressure, such as instrument lines and  electrical and ventilating conduits.
Aluminum alloy tubing that conforms to Federal Specifications WW-T-700/4 and  WW-T-700/6 is the most widely used for general-purpose lines of low and medium pressure. 

It is easily flared and soft enough to be formed with hand tools. Handle it with care to prevent scratches, dents, and nicks. Aluminum alloy tubing is used with either of two connection types: a flared joint for mechanical connectors or the beaded end for clamps and flexible hoses. In hydraulic systems, 5052-O aluminum alloy tubing that conforms to Federal Specification WW-T-700/4 is used for reduced pressure (1,500 psi maximum) and return lines. For high-pressure lines (3,000 psi), MIL-T-7081 aluminum alloy tubing (6061) is in considerable use. 

Stainless Steel Tubing. Corrosion-resistant steel (CRES) tubing, MIL-T-8504 and MIL-T-6845, is used in  high-pressure hydraulic systems (3,000 psi) such as landing gear, wing flaps, and brakes. It is preferred that external brake lines be made of stainless steel components (i.e., tubing, sleeves, nuts) to prevent damage caused by flying gravel and stones and ground-handling accidents. In other systems where stainless steel tubing is used (regardless of the tube size), it is preferred that only stainless steel nuts be used. This will minimize sleeve and nut cracking, which may be induced by overtorque of "B" nuts and vibration. CRES tubing does not have to be annealed for flaring or forming. In fact, the flared section is somewhat strengthened by the cold working and consequent strain hardening. The high tensile strength of stainless steel tubing permits the use of a thinner wall than does aluminum alloy tubing. Therefore, the weight is about the same as thicker-walled aluminum alloy tubing.

Tubing is sized by the Outside Diameters

The tubing used to produce rigid tubing assemblies is sized by its outside diameter (OD) and wall thickness. Outside diameter sizes are in sixteenth-of-an-inch increments, the number of the tube indicating its size in sixteenths of an inch. For example, the number 6 tubing is 6/16 or 3/8 inch, number 8 tubing is 8/16 or 1/2 inch, and so forth. Wall thickness is specified in thousandths of an inch.

Typical wall thickness for 5052-0 Aluminum temper fluid tubing is .035 inch.

   Stainless Steel Tubing, Nickel Alloy Tubing, Brass Alloy Tubing, Copper Nickel Pipe Material Grades



TubingChina.com All Rights Reserved

Directory | Standard | Heat | Heat Exchanger | Temperature | Pressure | Corrosion | Hardness | Surface | Properties | Select Stainless Steel | Contact US

Useful Tools:

Stainless Steel Weight Calculator
Metals Weight Calculator
Nickel Alloy Weight Calculator
Copper Brass Alloy Weight Calculator
Copper Brass Alloy Sheet Plate Weight Calculator
Sheet Plate Weight Calculator
Hardness Conversion Calculator
Hardness Conversion Chart
Rockwell Brinell Vickers Shore Hardness Conversion Chart
Conversion Calculator
Length Weight Temperature Volume Pressure Calculater
Pipe Working Pressure Calculator
Pressure Conversion Converter
Round Bar Size Calculator
Gauge Sizes
Sheet Metal Gauge
Pipe Schedule
Nominal Pipe Size
ANSI Pipe Chart
Inch to mm Chart
Stainless Steel Pipe Sizes
Stainless Steel Tubing Sizes Chart
Stainless Steel L H Grade
Stainless Steel Density
Conversion of Stainless Steel
Nickel Alloy Grades Comparison Material Grade Chart Carbon Steel
Structural Steel Comparison Chart



Main Products:

BA Tube | AP Tube
Condenser Tubes Tubing
Stainless Steel Reheater Tube Superheater Tubes
Stainless Steel U bend Tube
Nickel Alloy U bend Tubes
Copper Alloy U Bend Tubes
Heat Exchanger Tube
Super Duplex Pipe
Nickel Alloy Tube
Brass Alloy Tubing
Copper Nickel Alloys Tubes
Stainless Steel Hollow Tube
Stainless Steel Oval Tubing
Stainless Steel Square Tubing
Stainless Steel Rectangular Tubing
Stainless Steel Capillary Tube
Duplex Stainless Steel Pipe
Seamless Stainless Steel Tubing
Corrugated Stainless Steel Tubing
Stainless Steel Twisted Tube
Polishing Stainless Steel Tubing
Stainless Steel Aircraft Tube
Stainless Steel Hydraulic Tubing
Stainless Steel Instrumentation Tubing
Stainless Steel Angle Iron Bar
Stainless Steel Mechanical Tube
Bright Annealing Stainless Tube
Heat resistant Stainless Steel
Stainless Steel Welded Pipe
Extruded Serrated Finned Tubes Integral Finned Tubes / Extruded Aluminum Finned Tubes
Brass Alloys Copper Nickel Alloy Integral Low Finned Tubes
HFW High Frequency Welded Helical Spiral Serrated Finned Tubes
Corrosion Resistant Stainless Steel
Corrosion Resistance Stainless Steel

Stainless Steel Tubing Pipe

304 Stainless Steel Pipe
304L Stainless Steel Pipe
304H Stainless Steel Pipe
304/304L Stainless Steel Tubing
309S Stainless Steel Pipe
310S Stainless Steel Pipe
316L Stainless Steel Tubing
316Ti Stainless Steel Tube
317L Stainless Steel Pipe
321 321H Stainless Steel
347 347H Stainless Steel
904L N08094 Seamless Tubes
17-4 PH 630 UNS S17400 Stainless Steel
253MA S30815 Stainless Steel Tube
S31254 254 SMO Pipe
S31803 Stainless Steel
2205 Duplex Pipe Tubing
S32101 Stainless Steel
S32304 Stainless Steel
2507 Super Duplex Pipe
S32750 Super Duplex Pipe
S32760 Super Duplex Steel
1.4462 Stainless Steel Pipe
ASTM A213 | ASTM A269
ASTM A312 | ASTM A511
ASTM A789 | ASTM A790
ASTM B161 / ASME SB 161 | ASTM B111
EN 10216-5
ASTM A789 ASME SA 789 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Tubes
EN 10216-5 1.4462 1.4362 1.4162 1.4410 1.4501 Seamless Tubes
Nickel Alloy Tubing:

UNS N08020 Alloy 20 Tubing
UNS N02200 Alloy 200 Tube
UNS N02201 Alloy 201 Pipe
UNS N04400 Monel 400 Tubing
N06600 Inconel 600 Tube
N06601 Inconel 601 Tubing
N06625 Inconel 625 Tubes
N08800 Incoloy 800 Tube
N08810 Incoloy 800H Tube
N08811 Incoloy 800HT Tubing
UNS N08825 Incoloy 825 Pipe
ASTM B622 N10276 C276 Tubing
ASTM B622 N06022 Hastelloy C-22 Alloy Tubes
C28000 Brass Seamless Tubes C44300 Brass Seamless Tubes
C68700 Brass Seamless Tubes
C70600 Copper Nickel Tubes
C71500 Copper Nickel Tubes
DIN 2391 Seamless Precision Steel Tubes
EN 10305-1 E215 E235 E355 Seamless Precision Steel Tube Tubing Tubes
DIN 2393 St28 St34.2 St37.2 St44.2 St52.3 Welded Precision Steel Tubes
EN 10305-2 E195 E235 E355 Welded Cold Drawn Precision Steel Tube