8/12/2019 Practical Knowledge Related With Pipes and Tubes

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Practical knowledge related with pipes and tubes

1Category of pipes and tubes

1Categorization according to manufacturing method

1seamless pipehot rolled pipe, cold rolled pipe, cold drawn pipe, extrusion tube, pipe

jacking2welded tubeacategorization according to techniquesarc welded tube, resistance welded tubehigh-frequenc, low-frequenc, gas welded tube, furnace butt welded tubebcategorization according to weld seamstraight welded tube, spiral welded tube

2Categorization according to section shape1simple section steel pipe -- round pipe, square pipe, ellipse pipe, triangular pipe, hexagonal

pipe, lozenge pipe, octagonal pipe, semi-circular pipe, other2sophisticated section steel pipe -- non-equal hexagonal pipe, cinquefoil pipe, bicon!ex pipe,

biconca!e pipe, melon seed shaped pipe, conic pipe, corrugated pipes, watchcase pipe, other

"Ccategorization according to wall thickness -- thin-walled pipe, thick-walled pipe

#Categorization according to usage -- steel pipe for piping, hot working equipment pipe,mechanical industr pipe, petroleum pipe, tube for drilling, container pipe, chemical pipe, specialuse pipe, other

2Seamless pipe

$eamless pipe is a long steel material with hollow section and without joint seam% &ecause of thehollow section, it is widel used for liquid and gas deli!ering pipes, such as petroleum deli!ering

pipe, natural gas deli!ering pipe, utilit gas deli!ering pipe, water pipe, and solid material deli!eringpipe, etc% Compared with solid steel such as round rod, weight of pipe is lighter with the samebending strength and torsional strength% $eamless pipe is an economic section steel, and it is widelused for manufacturing structural elements and mechanic parts, e%g%, petroleum drill stem,

automobile transmission axle, biccle frame, and steel scaffold at construction site, etc% 'sing steelpipe to manufacture circular parts, can impro!e the material ieldsimplif the manufacturingprocedures, and sa!e materials and processing man power, e%g%, nowadas pipes ha!e been widel

used to make rolling bearing ferrule, and jack case, etc% (urthermore, pipe is a necessar materialfor making different kinds of routine weapons, e%g%, rifle and gun barrels are all made of steel pipes%)ipes can be classified into round pipe and shaped pipes according to the shape of the cross section%Circle has the largest area with a gi!en circumference, therefore, round pipes can deli!er moreliquid or gas% &esides, the stress o!er circular section is quite uniform when it is bearing

interior*exterior radial pressure, therefore, most of pipes are round pipes% +owe!er, round pipesha!e some limitations, too, e%g%, the tensile strength of round pipes is not as high as that of squared

pipe or rectangular pipe when it is subjected to plane bending% herefore, some agricultureequipment frame, and steel furniture are using squared or rectangular pipes% )ipes with other

different cross section shapes can be used for different purposes%

1% $tructural seamless steel pipe ./*012-13 is seamless pipe used for ordinar structuresand mechanical structures%2%4iquid*air deli!ering seamless pipe .&*01"-13 is ordinar seamless pipe used for deli!ering

water, oil, and gas, etc%"% 4ow*medium pressure boiler seamless pipe .&"506-13 is qualit carbon structure steel hotrolled and cold drawn rolled3 seamless pipe, which is used for manufacturing super heated !apor

piping and boiling water piping of different structural low*medium boilers, and super heated !aporpiping, big fume piping, small fume piping, and arch tubing for locomoti!e boilers%

#% +igh-pressure boiler seamless pipe .&7"15-173 is seamless pipe made of qualit carbon

steel, allo steel, or heat resistant stainless steel, which is used for manufacturing heating furnacepiping for high pressure boilers%

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7% (ertilizer equipment high-pressure seamless pipe .-03 is qualit carbon structural steelor allo steel seamless pipe, which is used for chemical equipments and piping with working

temperature of -#58#55 and working pressure of 158"5 9a%

%)etroleum cracking seamless pipe .-003 is seamless pipe used for furnace piping, heatexchanger, and piping of petroleum refineries%

6% :rilling pipe ;&2"7-653 is the steel pipe used b geolog departments to perform rock drilling,which can be classified according to their use into drilling stem, drill collar, rock core barrel,cannula, and sedimentation pipe, etc%0% :iamond core drilling seamless pipe .&"#2"-023 is the seamless steel pipe used for drill stem,

rock core barrel, and cannula for diamond rock core drilling%%)etroleum drilling pipe ;&720-73 is the seamless pipe used for petroleum drilling which isthickened at both ends from inside or outside% he pipe can be classified into threaded pipe and

non-threaded pipe% hreaded pipe is connected b connectors, while non-threaded pipe is connectedto the joints of tools with butt welding%

15% $hip carbon seamless pipe .&721"-073 is the carbon seamless pipe for manufacturing grade