Section two Tube Data Flashcards
Pipe sizes up to 12 inches are designated by nominal sizes which are smaller than the outside diameter of the pipe: where as in most cases tube sizes are identical to what?
Identical to the outside diameter of the tube
Tubing is classified into three major types what are they?
Structural tube, mechanical tube, and pressure tube.
Structural tube is used in construction of such things as?
Building frameworks roadway median barrier’s bridge structures and other general structural applications.
Maximum sizes for structural tubeing normally extend to what size and what wall thickness.
Up to 24 inches for round tubing with wall thickness up to 1 inch
Mechanical tube is utilized in a variety of:
Mechanical and structural applications
Mechanical tube has limited standards covered by ASTM or other agencies. Why is this?
Mechanical tubing is usually manufactured for a specific applications needing particular mechanical and chemical properties.
Why is pressure tubing the type of tubing most often used in the pipe industry?
Is designed to carry fluids under pressure.
Pressure tubing is available in several material classifications. Name seven of them.
- aluminum tubing
- Special application tubing
- Copper tubing
- Special Alloy tubing
- carbon steel tubing
- Plastic tubing
- Stainless steel tubing
Aluminum tubing is available in both:
Welded and seamless forms in various alloys, tempers, and wall thicknesses.
(Copper tube)
There are numerous types of copper and copper alloy tubing being manufactured however the greater part of copper tube used in piping industry is manufactured:
It’s manufactured with a minimum of 99.9% pure copper.
Copper: This type of tubing designation is to be measured by its approximate what?
Inside diameter and is often referred to as plumbing tube.
Plumbing to designation consist of tube types:
Type K, type L, type M, Pressure tube and DWV, a non-pressure type of tubing.
(Copper) and other type of tubing which is designated by the outside diameter and wall thickness measurements. It comprises of ACR. What is ACR? what is GP?
Air conditioning and refrigeration. General purpose.
STILL TUBING: Still tubing is designed for process refinery type heater applications for the tube is subject to what?
External furnace temperature is higher than the fluid or vapour is contained internally in the tube.
Still tubing is usually supplied in what three types?
Seamless, hot finished or call drawn types for various ranges of temperature and pressure.
General purpose tube: two classification under this heading is used for applications that require what?
General service types of tubing.
For general purpose tube, standards ASTM a 179 and SAEJ524B Society of automotive engineers standards are usually two major carbon steel tube specifications under this classification the tubes are what?
Low-carbon and seamless tubes which are cold drawn and in the case of SAE tube are annealed for bending and flaring
Special application tube: to being classified in this group is used for applications where?
Environmental conditions or installation requirements require a specific type of two or tube arrangement.
Bundle metallic or plastic tube: these two bundles can also be classified as what?
Special application tubing.
Bundle metallic or plastic tube is primarily used for what?
Pneumatic measurement and control signal instrumentation lines.
Service conditions that require tube outside the scope of carbon steel or stainless steel specifications can usually be accommodated by what type of tube?
Special alloy tube.
Why is plastic tube becoming more commonly used?
Because of that’s good corrosion resistance, ease of handling and low cost of manufacturing.
What applications would plastic tube be used for?
Instrumentation air beverage and pharmaceutical lines.
What are the more common types of plastic tubing used?
Nylon, polyethylene, polypropylene, Teflon and PVC.
What is the working pressure for plastic tubing?
Range up to 600 psi what temperature maximums as high as 400°F.
When bending tube a side effect is gain. The gain on a 90° bend is approximately equal to what?
Outside diameter of the tube being bent.
