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Pipe mill material : carbon steel Application: Energy supply pipe Mechanical expanding packing suitable for the distance shipment. Application and features of the machineThe single head mechanical expander for pipe is the necessary special equipment LSAW line for oil and gas transportation, whose performance is as following: 1) Expanding to radial of pipe so as to reach the precise roundness and diameter. 2) Reliving the stress of pipe in the process of cold rolling, increase the yield stress of material . 3) Inspection for the weld seam. The expanding for pipe is processed by stages. The pipe is carried into the expander head by the feeding carriage, which is expanded by stages till full length of pipe. The machine is machine group type. There are 3 functional working positions in the lengthwise position. 1) It is the front washing work position from pipe feeding direction 2) Expanding position in the middle 3) Next is post washing position It is 2 transverse cars and its rails crossed 3 positions in the horizontal position. Every mechanism on each working position can work separately and together. Each work position can work separately. 3 working positions and 2 transverse cars can automatically work together. Technical requirements to expanded pipe1) Minimum pipe outside diameter 20 (508mm) 2) Maximum pipe outside diameter 56 (1422mm) 3) Minimum pipe length :8m 4) Maximum pipe length: 12.2m 5) Minimum pipe wall thickness: 6.4mm 6) Maximum pipe wall thickness: 40.00mm 7) Material grade API.X70 (yield strength maximum 62/Mpa) Wall thickness will be reduced according to material grade API. X80 ?(yield strength maximum 690Mpa) 8) Physical properly deviation of material (yield strength):≤10 of full material rage 9) Wall thickness deviation of material:≤5 of full dimension 10) Roundness of pipe ≤0.3% 11) Straightness of pipe:≤0.3% of full pipe length 12) Surplus height of seam :≤3.5mm , width of seam ≤35mm Main parameter Type of machine: machine groupExpanding mode: mechanical expandingSteel pipe rangeDiameter: Φ508 Φ1422mm , wall thickness: 8-40mm, length: 8-12m Material grade: X70 (API standard) Expanding rate range 0.8-1.5, optimum range :1-1.12Precision range of steel pipe after expanding: tolerance of diameter roundness ≤±0.8D, tolerance of diameter straightness ≤0.2Production efficiency :Oil cylinder, mounting type horizontal Nominal pull force 16069KN Nominal pull force for large oil cylinder 12812KN Nominal pull force for small oil cylinder 3257KN Rated working pressure 25Mpa Expanding speed: 4-8M/M