Steel Grating Manufacture Process

HengZhou Steel Grating is manufactured by computer-controlled steel plate high-voltage welding machine with the most advanced skills over the world. The manipulator automatically put the cross-steels (twisted steel or round steel, same as below) onto the well-distributed flat steels. And welding spot would be firmly fixed by welding the cross-steels into flat-steels with a powerful electric welding power and fluid pressure. In this way our high-quality and intensive-stability steel grating is formed. However, the hand-made steel grating is made as below: Firstly holes are bored into the flat steels which has reduced the its cutting strength. Secondly, the cross-steels are put into the holes to weld, which results in chinks between cross-steels and flat-steels. What’s more, not every contact can be welded which not only makes the appearance irregular but also gets the welding less firmed and the steel less strong.

HengZhou Steel Grating is manufactured following the process flow chart as below:

Steel model

Product Standards

HOT GALVANIZING STANDARD: GB/T13912-2002( CHINA)

STEEL GRATINGS STANDARD: YB/T4001.1-2007( CHINA), ANSI/NAAMM MBG 531-00 (U.S.A)

PACKING STANDARD: EXPORT ENTERPRISE STANDARD

STEEL GRATINGS MATERIAL : CARBON STEEL (Q235 CHINA)

TYPE OF MATERIAL:UNTREATED,HOT-DIP GALVANIZED

TYPE OF GRATING: OPEN END (WITHOUT END BAR), CLOSE END(WITH END BAR)

TYPE OF BEARING BAR:  SERRATED BAR,PLAIN BAR

TYPE OF CROSS BAR:  TWISTED SQUARE BAR

PITCH OF BEARING BAR:  25,30,40,50,60,80,90MM,OF WHICH 30 AND 40MM ARE RECOMMENDED