Usage: Used for low pressure liquid delivery, such as water, gas, and oil; construction and pilingStandard: API 5L, API 5CT, ASTM A252, ASTM 53, EN10217, EN10219, BS 5950, ASTM A572 , JIS, IS,Certificate: EN10217, EN10219, API 5L PSL1/ PSL2, API 5CTOut Diameter: 219.1mm –3048mmWall Thickness: 5.0mm-30mmLength: Up to 70mSteel Grade: API 5L: GR A, GR B, X42,X46, X56, X60,X65,X70 , ASTM A252 GR 1, GR 2, GR 3 , ASTM A53: GR A, GR B, GR C, GR D , BS 4360: Grade 43, Grade 50 , EN: S275, S275JR, S355JRH, S355J2HSurface: Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen Coating, Black Oil coating as per customer’s requirementTest: Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test.
1. Coil Probe: steel coil into the production line, the first full board Ultrasonic Inspection2. Leveling Milling: through anvil plate leveling machine so that the original curl, and then pass the two edges of steel-sided milling machine milling, so that up to the requirements of the plate width, plate edge parallel groove shape3. Cut Type: steel production line along the outer edge of the coiled-coil tube4. welding and cutting: the use of advanced technology for pre double submerged arc welding cutting inside from the foot of the welding specification welded steel pipe welded outside use, etc.5. Visual inspection: some basic parameters by a professional technician check6. ultrasonic flaw: the inner and outer sides of the base metal and weld seam 100% inspection7. X-ray detection: internal and external welds 100% X-ray television industry checks, the use of image processing system ensures detection sensitivity8. Pressure test: hydrostatic testing machine by-root test steel pipe up to the standard requirements to ensure that the test pressure9. Chamfer level: steel pipe inspection pipe end processing, up to the requirements of the pipe end beveling size10. Check: X-rays and then subjected to ultrasonic testing and magnetic particle inspection conducted pipe end, check whether the deposit welding problems and defects in the pipe ends.11. Oiled Marking: Qualified oiled steel pipe corrosion and in accordance with user requirements for marking.
DOUBLE SUBMERGED ARC WELD PIPE:
Doublesubmergedarcweldedpipe(DSAW)derivesitsnamefromtheweldingprocesswhereintheweldingarcissubmergedinfluxwhiletheweldingtakesplace.Bothinsideandoutsideweldsare required and are usually accomplished in separate processes, hence the word "double." These separate welds consume a portion of the other resulting in a single high quality weld nugget.br/ DSAW pipe is produced in sizes from 18" through 72" 00 and wall thicknesses from .250" through 1.5".TwodifferentprocessesareusedtomanufactureDSAWpipe;thepyramidrollsmethod,andtheU-O-Emethod.Thedifferenceintheprocessesisfoundonlyinthemethodofformingthecylinder.In thepyramidrollsprocessthecylinderisformedbetween3rollsarrangedinapyramidalfashion.Asthenameimplies;theU-O-Emethodusesa"U"press,and"0"pressforforming.Otherpartsof the process such as finishing and inspection are similar. Both processes use flat steel plate as the raw material. DSAWpipemayormaynotbecoldexpanded.Coldexpansionisaprocesswherethepipeisexpanded(upto1_5%)toobtainitsfinal00dimension.Intheprocess,againofyieldstrengthresults. Expansion is most often utilized in a U-O-E mill due to the need to recover the yield strength lost during forming in the "0 press, DSAW pipe is available in the following grades: ASTM A134, A139, A252, A671, A672, A690, A691, CSA (Canadian) - Z245.1 and custom specifications. API 2B, 5LB, 5LX-42 thru 5LX-80DSAWpipeisnormallyproducedindoublerandomlengthswithsquareendsorbeveledforwelding.Itisusuallyfurnishedbarebutvarnishisalsooffered.Awiderangeofexternalcoatingsand internalliningsareavailablewithDSAWpipe.Theseincludefushionbondepoxy(FBE)coatingsandthinfilmepoxylinings.DSAWpipeisusedinhighpressuregasandoiltransmissionlines(both onshoreandoffshore),structuralmembersandpipepiles.Majorpurchasersincludeliquidandgastransmissioncompanies,hammercompanies,constructioncontractors,platformfabricators, government agencies and pipe distributors.
SPIRAL WELD PIPE:
Spiral Weld Pipe, as the name implies, is a steel pipe which has a seam running its entire length in a spiral form. In the past, due to the method of manufacture, Spiral Welded pipe was relegated to low pressure and structural applications. With the development of the Submerged Arc Welding process, the production of large hot rolled coils of sufficient width and the development of dependable non-destructive testing methods, it is now possible to produce Spiral Weld pipe for high pressure service. Present Spiral Weld mills consist of a de-coiling device (in the case of strip base material) or a plate preparation table (where the base material is in plate form) a strip connecting welder, straightening rollers, edge preparation tools (shearing and trimming), prebending devices, a three roller bending and cage forming system, an internal welder, an external welder (both Submerged Arc), ultrasonic testingapparatusandcuttingdevices.Thematerialpassesthroughalltheseproductionstagescontinuously.TheanglebetweentheflatstripbeingIfedintothemachineandthefinishedpipeleavingthe machine controls the pipe diameter in ratio to strip width and the angle of the weld in the pipe. Becauseofthemethodofmanufacture,awidevarietyofdiameterscanbeproduced.Thediametertoleranceissmall,particularlywithregardtoovality;andthepipe,duetoitsaxialsymmetry,has aninherentstraightness.Thelengthrangeisinfiniteandiscontrolledonlybytheeconomicsoftransportation.SpiralWeldPipeisusedfordredging,slurry,waterandotherpipelines,aswellaspiling and structural applications. Spiral Weld Pipe is produced in accordance with the dimensional and tolerance requirements of various ASTM, AWWA, and API Specifications.