"Roll canal " the name of steel tube product that is not a standard, however a kind of craft is described or the common of product configuration says. It basically has the following two meanings: As producer goods: Those who point to is steel roll, namely rolling hind is curly the spring that becomes a state / metal strip. This is the raw material that production solder provides. As finished product: Point to through armor plate or metal strip curly the steel tube that shape and solder and makes. Below condition of this kind of words, "Roll canal " refer in particular to canal of helix seam welding normally.
One, what is a canal?
"Roll canal " the name of steel tube product that is not a standard, however one kindCraft descriptionOrProduct configurationcommon says. It basically has the following two meanings:
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As producer goods: Those who point to isSteel coils, namely rolling hind is curly the spring that becomes a state / metal strip. This is the raw material that production solder provides.
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As finished product: Point to througharmor plate or metal strip curly shape and solderAnd the steel tube that makes. Below condition of this kind of words, "Roll canal " refer in particular to normallyHelix seam welding is in charge of.
2, " roll canal " as finished product (helix seam welding is in charge of) detailed and analytic
This is " roll canal " the meaning that often is pointed to to take the place of, it is especially in the communication of blame major personage.
Core characteristic:
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Welding line is shown gyroidal: This is its striking exterior feature.
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With makings is agile: Can use the metal strip of same width, shape through adjusting angle, production gives the steel tube of a variety of diameters.
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Requirements is large: Can produce the tubal material with very big diameter (can amount to number rice) .
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Cost is inferior: Seam a canal at straight seam welding is in charge of and be not being had relatively, manufacturing cost has an advantage.
Main workmanship:
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Open a book to read and leveling: Coil the steel that serves as raw material open and leveling.
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Cut edge and butt joint: Undertake handling to metal strip brim, solder the termination of around metal strip together, assure serial production.
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Helix shapes: Metal strip shapes complexly through implement, by continuously curly into helix shape.
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Inside and outside solders: Shape in steel tube in the process, use technology of the solder that bury arc to be seamed internally at the same time outside mixing, seam undertake soldering.
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Cut and examine: Will continuous steel tube cut becomes specified cut lengths, undertake follow-up processing and nondestructive detect.
3, basically use a field
Welding line is shown gyroidal: This is its striking exterior feature.
With makings is agile: Can use the metal strip of same width, shape through adjusting angle, production gives the steel tube of a variety of diameters.
Requirements is large: Can produce the tubal material with very big diameter (can amount to number rice) .
Cost is inferior: Seam a canal at straight seam welding is in charge of and be not being had relatively, manufacturing cost has an advantage.
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Open a book to read and leveling: Coil the steel that serves as raw material open and leveling.
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Cut edge and butt joint: Undertake handling to metal strip brim, solder the termination of around metal strip together, assure serial production.
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Helix shapes: Metal strip shapes complexly through implement, by continuously curly into helix shape.
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Inside and outside solders: Shape in steel tube in the process, use technology of the solder that bury arc to be seamed internally at the same time outside mixing, seam undertake soldering.
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Cut and examine: Will continuous steel tube cut becomes specified cut lengths, undertake follow-up processing and nondestructive detect.
3, basically use a field
Roll canal (helix seam welding is in charge of) because its are big caliber and cost advantage, apply extensively at the following domain:
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The fluid is carried:
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Water is carried: The city feeds drainpipe net, water conservancy project.
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Oil gas is carried: Inchoate carry cop with the oil gas of a few low pressure, line more uses high-pressured main force to seam the solder that bury arc to be in charge of continuously now.
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The structure is propped up:
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Pile canal: The fundamental pile of building, bridge, dock.
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Pier, Tubal corridorWait for the column propping up of large building construction.
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Other utility:
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Ventilating duct: The factory that needs big diameter is ventilated system.
4, with the differentiate and analyse of other steel tube
To understand better " roll canal " , we undertake its and relevant steel tube contrast:
| Feature | Roll canal (helix seam welding is in charge of SSAW) | Straight seam welding is in charge of (LSAW/ERW) | Without seam a canal (SMLS) |
|---|---|---|---|
| Welding line configuration | Gyroidal | One linear | Without welding line |
| Raw material | Metal strip | Armor plate (LSAW) or metal strip (ERW) | Circle billet |
| Main advantage | Requirements is large, use expect agile, cost is low | Welding line weak point, quality stability, bear control capacity strong (especially LSAW) | Integral sex is good, bear control capacity security is strong, high |
| Main inferior position | Welding line is long, leftover stress is greater, bear control capacity relatively weaker | Caliber suffers be restricted (especially ERW) , cost prep above spiral coil cooling tube | Tall, caliber bears cost be restricted (large requirements is troublesome produce) |
| Representative application | Be defeated by water, pile, structure to prop up, low-pressure carry | Duct of high-pressured oil gas line (LSAW) , the fluid is carried (ERW) | High-pressured boiler, oil getting is collected, component of rigid structure key |
