1. threetypepipe， to partto solvewhatquestion？

to cut · to heat

Oxygen + twin acetylene hose

the whole journeysupplyoxygen、the whole journeysupplyinflammable Gas， Color zoning to prevent misconnection。 to fit gas, before to heat etc flame welding and cutting workstation。

MIG / MAG

CO2 gas-line hose

Connect valve to convergedrain send machine/to reduce pressure ， to place particular emphasis on Continuous shielding-gas supply for GMAWWiththe sceneto pull。

TIG · accuracy

Argon gas-line hose

stainless steel、aluminum alloyargon arc weldingright Gas-line cleanliness With Stable flow ratemoresensitive， Specialpipemore Withpressure reducing valve、quick connectto mate or marry。

2. Common on-site pain points and targeted risks

mixed media use or poor compatibility：using an ordinary compressed air hose as a substitute for a gas welding hose， oil resistance, aging resistance, and pressure capacity do not match the application， leakage usually appears first at the fitting。
hose diameter and flow rate are mismatched：Largethickness CO₂/MAG Longtime， a small-diameter hose causes a large internal pressure drop， the arc and shielding gas become unstable。
the twin hose colors and national-standard color habits are unclear：the risk of reversing oxygen and acetylene connections is extremely high； misconnection is more likely when old and new national-standard color markings coexist。
bending and crushing：carts or workpieces may crush the hose and flatten it， risk increases when local overheating or backfire occurs。
disorganized inventory：multiple hose rolls have no identification labels， the same hose roll is repeatedly reused for different gases， inner wall residue and gas permeation create hidden hazards。

3. Products With Product Selectionmain point（8mm to rely mainly online）

that level or lower Withinternal diameter 8mmof Industryrubberglue （ rubber plastic Composite ） Welding air line Hose for model Specification to express， concreteexternal diameter、wall thickness、working pressure、Burst Pressure、Suitable for StandardWith Leave Factorycertificate of conformity Withtest reportto serve as the norm。

to contrast	Oxygen / twin acetylene hose	CO2 gas-line hose	Argon gas-line hose
typical use	gas 、gas welding、to heat	MAG/MIG to protectgas Conveying	TIG to protectgas、accuracy Welding
medium Features	supports combustion + inflammable， to strictly prohibitconnect 、to strictly prohibitgreasy dirt	High Pressure gasmanageto reduce pressureafterlow pressure Conveying， to take note ofdry Withflow rate	inert， moreto pay attention toimpurity Withto leakrate
pipediameter（to illustrate）	internal diameter commonly seen Specification Φ8mm etc， according to Welding Machinespecifiedflow rate Withpipinglength Product Selection
color / standard	according to GB/T 2550 etcto be in effect Standardto differentiateoxygen piping； the scenesecondto hang up a plateto confirm	to proposeindependent standard label「CO₂」	to proposelabel「Ar」， Dedicated hose for dedicated service
connector Withto check for leaks	Special /connector， to installafter Soap-solution leak test， at set datesto replaceto agespacer	to take note of Withpressure reducing valve、to heat （ have）interfaceto mate or marry	to pay attention to leakright to protectofinfluence

important：Oxygen Acetyleneschool assignment to comply withmove Withgas cylinder Safeto superviseto stipulate； Hose forair lineonering， matchingto meet the standard requiredto reduce pressure 、Flashback preventer（Acetylene ）、Leak-stop fitting Scrapping standard。 must not pressure、must not to serve in the army。

4. parameter with Scenes to fall to the ground （ Purchase list of items thought）

1. Oxygen + twin acetylene hose

Scenes：steel plate material、construction sitegas 、maintenance ； needat the same timeto put in orderoxygen、 road to movefrequently。
to fall to the groundmovement：to arriveto check standard Withlength； With 、standardized regulator connection size； Establish“ Special ”to avertto shift。

2. carbon dioxide hose

Scenes：workshop MAG 、carbon dioxidegasprotect Welding Machineto concentratesupplygas single supplygas。
to fall to the groundmovement：according to Welding Machineto recommendflow rate corepipediameter Withlength； to take note oflow temperatureknot rightconnectorofinfluence， crucial pointpositionto keep hot to drain。

3. argon hose

Scenes：stainless steelkitchen implements、tubing、thin plate TIG； rightair-bubblesensitiveof Productsline。
to fall to the groundmovement：Dedicated hose for dedicated serviceto lessengreasy dirt Withwater vaporto sneak into； to replace whole to replaceto surpassfrequentlyto join up。

5. to trustto recite from memory： howinspection of goods With

Standard Withstandard：to ask products to implement Standard （ If Welding Rubber Hose related national standard ）, Production license CCC Suitable for notes （ according to category ）, batch model。

pressure Withoutward appearance：check the nominal working pressure, Burst Pressure, Production Date； pipebodynoto crack、to bulge、graveto harden。

canto go upstream：identicalbatch retention samplephotograph quarantinesingle， easy toconstruction sitesampling Withresponsibility allocation。

to cultivate Withsystem：welder beforeclear-cut“whatkind Gasusewhatkindcolor/labelofpipe”， Withthe scene MSDS、to respond to an emergencycontingency planconsistent。

to needΦ8mm Oxygen-acetylene twin hose / carbon dioxide hose / argon hoseof Specification 、custom pressure rating and length， connection Salesto gainformalto quote a price Withtest reportsummary。