One, what is the structure uses a pipe?

The structure uses a pipeIt is to point to basically use make all sorts ofBuild the structure, rigid structure, component part that prop upsteel tube. Its core function is to regard as "Skeletal" , bear load, deliver the force, stability that maintains a structure and form.

With " the fluid uses a pipe " essential distinction depends on: The core that the structure is in charge of is mechanical function, and the core that the fluid is in charge of is bear press and sealing.

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2, the structure uses main characteristic of the canal

1. Superior mechanical performance: Go after high intensity, stiffness and good tenacity, in order to bear drawing, compress, bend, turn round wait for complex stress.

2. Economy is efficient sectional: Below contented and same intensity and stiffness requirement, steel tube is sectional (especially round canal and square rectangular canal) than sincere rolled steel more province makings, weight is lighter.

3. Good machinability: Have cut easily, bend, stiletto, solder wait for follow-up treatment, convenient make all sorts of structural member.

4. The exterior is beautiful: Especially square rectangular canal, line is concise, contemporary sense is strong, commonly used in the building at needing a structure.

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3, ultimate cluster

The structure uses a pipe phyletic and various, basically press its sectional appearance and workmanship classification:

1.Press sectional appearance classification

• The structure uses seamless steel tube: Sectional for the circle. The structure that is tradition and foundation provides a form, isotropy (the performance of each direction is consistent) , fight bend and fight it is good to seize property.

• The structure is used solder steel tube: Sectional for the circle. Through will solder after armor plate or metal strip are curly and be being become, cost is low, conduit of producible large requirements.

• The structure uses hollow profiled bar: This is the structure uses a branch with very important valve, shape to solder normally.

• Square rectangle is in charge of: Application is extremely wide, because of its flat surface facilitates with its his component joins, a large number of use is in in building, place, mechanical frame.

• Elliptical canal, Semicircle canalWait for different canal: Multi-purpose wait for the situation that has demand of special outward appearance at furniture, adornment.

2.Press workmanship classification

• Without seam structural canal: Pass hot-rolling or cold-drawing production, whole does not have welding line, mechanical function is evener, use at important structural member.

• Solder structural canal: Wait for craft to produce through the high frequency solder, solder that bury arc, efficiency is tall, cost is low, it is the mainstream choice of most building and rigid structure.

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4, main standard and material pledge

• Commonly used standard:

• GB/T 8162" the structure uses seamless steel tube " : This is core without seam a structure to provide a standard.

• GB/T 6728" the structure uses cold curved hollow profiled bar " : This is square rectangular canal solder the core standard of hollow profiled bar.

• GB/T 3091" low-pressure fluid carries with solder steel tube " : Although the name is " the fluid is carried " , but the galvanization solder that its make is in charge of (like DN15-DN150) also use at the low stress structure such as scaffold, baluster in great quantities, need to be judged according to effective use.

• Common capable person is qualitative:

• Carbon steel: Q235 (class of A, B) , 20# steel, it is commonly used.

• Low alloy high strenth steel: Q345 (16Mn) , q390, use at need more the heavy construction of high strenth.

• Steel of structure of element of high grade carbon: 45# steel, use at making mechanical part.

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5, applied domain

The structure uses a pipe nowhere is absent, its application covered all industry field almost:

• Building steel structure:

• Workshop, storehouse: Roof tuss, bridge, column, prop up.

• Large and public construction: The building of station of boat of stadium house, airport, network that shows a center wears a structure.

• High-level building: Wall of accessary structure, act supports a system.

• Machinery is made:

• Project machine: The jib of grab, automobile crane, batholith.

• Agricultural machinery: The frame of mower, tractor.

• Conveyer fetterses: Bracket of platen, conveyer belt.

• Hydraulic pressure bracket: The colliery uses the cylinder body of hydraulic pressure pillar.

• Bridge construction: Use as the accessary structure of the arch costal region of pier, arch bridge or bridge.

• Tower mast structure:

• Electric power iron tower: Tower of high-pressured tranit electricity.

• Communication tower: Signal launchs a tower.

• Wind-force generates electricity: Tower canister (although large tower canister is special board coils,make, but the structure that belongs to a model bearings canal) .

• Daily establishment:

• Scaffold: Building construction is used.

• Protect column, baluster: Segregation of the balcony, stair, driveway is taken.

• Furniture: Desk and chair, goods shelves, reveal frame.

• Car is made: Framework of automobile body of car frame, bus.

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6, core differentiate and analyse: The structure uses tubal Vs. The fluid is used be in charge of

This is project select material in basic also be distinguish importantly. We contrast systematically again:

Feature	The structure uses a pipe	The fluid uses a pipe
Core function	Bear load, compose establishs framework	Carry a fluid, assure sealed
Function emphasizes particularly on	Mechanical function(tensile strength, succumb result of intensity, outspread rate, concussion)	Bear press ability and sealing
The key examines project	Mechanical function experiments(drawing, bend, pound wait)	The hydraulic pressure that chase a root experiments(examine bear pressure and sealed)
Commonly used standard	GB/T 8162(without seam) , GB/T 6728(square quadrature canal)	GB/T 8163(not have seam a fluid)
Material is qualitative (give typical examples)	Q235, q345, 20# , 45#	20# (commonly used) , q345B
Apply setting	Workshop roof tuss, mechanical arm, iron tower	Conduit of hydraulic pressure vitta, pneumatics conduit, fire control
Common analogy	Architectural " bone of iron of reinforcing steel bar "	Of equipment " hemal "

Important clew: Although the standard has,distinguish, but in certain requirement not tall circumstance, existence mixes both likelihood with. For example, one is in charge of with the structure (GB/T 8162) production component part, if its bear press ability to pass computation enough, use possibly also carry low-pressure fluid. But inIn key and normative application, must select the tubal capable person of corresponding standard strictly according to design utility, in order to ensure safe.