Wind Power Flange (MGS-WF024)

MEGATRO provide every type of wind power flange with specification as follow: 1 application: The connection fasteners of wind power tower 2 Material: Q345E, S355NL, S355J2 etc 3 size: Φ 1000-8000 4: Minimum order: 1 set Production requirements: As per our client requirements Lead time: To be discussed by both Buyer and Seller Origin: Qingdao, Shandong province, China Payment: TT; L/C General Fabrication RequirementsHere is general fabrication requirements for our transmission tower; however, both parties must discuss all drawings and confirm all shop drawings, technical specification, and which standard to conform. Before mass production, we must received all signed approved shop drawings and technical documents from our client.  Our Fabrication shall be in strict accordance with detail Drawings prepared by the Contractor and approved by the Engineer.  Fabrication shall begin after the approval of the shop assembly and tests.      Shearing   Shearing and cutting shall be performed carefully and all portions of the work which will be exposed to view after completion shall be finished neatly.  Manually guided cutting torches shall not be used. All material over 13 (or 12) mm thick shall be cold sawn or machine flame cut.Cropping or shearing shall be allowed for material thickness of 13 mm or less.Flame cutting of high yield steel shall be preceded by a slight preheat operation by passing the cutting flame over the part to be cut.All flame-cut edges shall be ground clean.       BendingBending shall be carried out in such a manner as to avoid indentation and surface damage. All bending over 5o, or high yield steel, shall be performed while the material is hot. Welding No welding shall be done unless prior approval has been obtained from the Engineer.Welding shall not be allowed at tower attachment points for conductor, shield-wire, insulators or associated assemblies or brackets. Sub-punchingAll holes in structural steel less than 10 mm thickness may be punched to full size unless otherwise noted on the approved Drawings.  Holes shown on the Drawings as drilled holes and all holes in structural steel 10 mm or more in thickness and tension members of cross-arms shall be drilled or sub-punched and reamed. All holes shall be clean cut and without torn or ragged edges.  All burrs resulting from reaming or drilling shall be removed.  All holes shall be cylindrical and perpendicular to the member. Where necessary to avoid distortion of the holes, holes close to the points of bends shall be made after bending. PunchingFor punching to full size, the diameter of the punch shall be 1.0 mm larger than the nominal diameter of the bolt, and the diameter of the die shall not be more than 1.5mm larger than the diameter of the punch. For sub-punching, the diameter of the punch shall be 4 mm smaller than the nominal diameter of the bolt, and the diameter of the die shall be not more than 2 mm larger than the diameter of the punch.  Sub-punching for reamed work shall be such that after reaming no punch surface shall appear in the periphery of the hole. Hole SizeWhere holes are reamed or drilled, the diameter of the finished hole shall be not greater than the nominal diameter of the bolt plus 1.0 mm. AccuracyAll holes shall be spaced accurately in accordance with the Drawings and shall be located on the gauge lines.The maximum allowable variation in hole spacing from that indicated on the Drawings for all bolt holes shall be 0.8 mm. Fabrication TolerancesA specification for tolerances shall be submitted for approval by the Engineer prior to commencement of fabrication. Bolt ListA complete list of bolts showing their lengths and the members, which they are to connect shall be given on the erection diagrams. Step bolt:Each  steel tower  shall be provided with step bolts on one of the legs for single circuit steel  tower  and  on  two  diagonally  opposite  legs  for  double  circuit  steel  tower  from approximately  2.5  meters  above  ground  level  to  the  cross  arm  and  from  thereon  to each  ground  wire  peak.  Step  bolts  shall  be  furnished  for  each  leg  extension  in  an amount of 25% of the step bolt holes. These bolts shall not be less than 16 mm or 3/4" diameter, double nut type, 18 cm or 7" long with 35 mm or 1 5/8"diameter, symmetrical head, two hexagon nuts and spring washers, spaced not more than 45 cm or 18" apart. Each bolt shall withstand without permanent deformation a vertical load of at least 137 kg applied at the bolt head. If any technical specification, we will discuss with our client and confirm before mass production.  Locking DevicesLocking devices for tower bolts will not be required, but point punching shall be performed. Anti-theft Fasteners    Appropriate anti-theft fasteners for example Huck-bolting shall be applied on all the towers up to the level of anti-climbing devices, to prevent theft of tower members. Piece MarksAll pieces shall be stamped before galvanizing with the piece marks sho