Sealed Pickproof Well Cover is widely used in city construction projects due to its seal
ability. Its frame is made up of angle steel, and tigh-tly joined with the
steel grating through the hinge. The checkered plate welded with the steel
grating has the seal ability.

Ningbo Jiulong Machinery Manufacturing Co.,Ltd is the second largest steel grating manufacturer in China whose capacity is 50000 tons one year!! Our products are a part of construction.

We produce steel grating, stair tread, fence,clips, chench cover, handrail stanchion, walkway, steel ladder and so on. These products are widely used on mine, factory plant, Oil industry,shipbuilding, marine engineering, airport project, construction industry and so on.

Standard descriptions:

1. Bearing bar(load bar):20x3 ..... 75x10 mm.

2. Bearing bar pitch: 12.5, 15, 20, 23.85, 25, 30, 30.16, 30.3, 32.5, 35, 40mm. US standard: 1"x3/16", 1 1/4"x3/16", 1 1/2"x3/16",  1"x 1/4", 1 1/4"x 1/4", 1 1/2"x 1/4" etc.

3. Cross bar pitch: 38,50,76,100,101.6mm

4. Material: Q235, Stainless 304

5. Surface treatment: black, galvanized, paint

6.Standards:

1).China: YB/T 4001.1-2007

2).USA: ANSI/NAAMM(MBG531-88)

3).UK: BS4592-1987

4).Australia: AS1657-1985