We collect these frequently asked questions and help customers further understand our company and products.
If you are looking for more details, kindly visit our website.
1. What standards do your steel gratings meet?
We are able to manufacture steel gratings in complaint with standards in different countries, such as YB/T.1-, ANSI/NAAMM (MBG531), BS and JJS Standards.
2. How do you control the quality of your gratings?
In order to get high quality, we introduce advanced production lines and inspection machines, strictly follow the manufacture requirements and gained countless certifications. 70% of our gratings are sold overseas, well demonstrating the superior product quality.
3. What specifications and types do you supply?
Jiulong has the manufacture ability to offer steel grating of any specifications or types. You only need to inform us your special requirements about dimensions, materials, color and anything you think we should know.
4. What’s your raw material?
Our raw materials include Q235 and A36carbon steel and stainless steel. Additionally, we can also use material that the customer appoints.
5. What’s the difference between plain grating and serrated grating?
The serrated grating possesses better anti-slip performance but higher price than plant grating, widely used in petrochemical engineering.
6. What’s the surface treatment?
The surface treatment includes hot-dip galvanization, painting, electrostatic coating or non-treatment.
7. What does length and width exactly refer to?
In a grating, the length means the length of bearing bar while width means the length of cross bar. When you place an order, please make the dimensions clear and avoid mistakes.
8. How do you calculate the area of each grating?
a. For regular shape grating, the area equals to length multiplied by width of grating, including the area of holes and notches.
b. For irregular shape grating, the area is that of the steel grating before cutting, instead of the area of irregular shape grating.
9. Why should we offer the structure drawing and detailed parameters of the work site?
This is a requirement for better servicing you. Based on your structure drawing and parameters, we design and offer a grating perfectly suits your work site and ensure no extra cutting while usage. It greatly simplifies the installation work and saves your time. What’s more, according to the information you offer, we can recommend you the best suitable grating, which will save you time and money. We can also avoid the confusion between length and width mentioned in Q7 and prevent unnecessary economic loss for you.
10. Do you accept rush orders?
If the order requires 30% of our raw materials, we will accept your rush order. We will use four pressure welding machines and assign three teams of workers. For hot galvanization, we have built a galvanized pool.
The main difference between the two gratings is the mode of production.
Welded steel grating
It is a steel grating fixed by pressure resistance welding in the each intersection point of bearing bar and cross bar, and the cross bar is generally used by square steel or twisted steel. It provides a robust structure, high strength and great carrying capacity. It is commonly served as walkways, stair treads, fences, floors, etc.
Figure 1: Welded steel grating for desks and seats
Figure 2: Welded steel grating for security fence
Press-locked grating
If you are looking for more details, kindly visit Shunbo Steel Grating.
It is a steel grating fixed through the pressure to make the cross bar into the pre-open flat steel in the each intersection point of bearing bar and cross bar, and the cross bar is usually flat steel. It offers a stable connection and an attractive appearance. It is widely used in factories, civil and commercial buildings for stair treads, trench covers, floors, platforms, fences, etc.
Figure 3: Press-locked steel grating for pipeline cover
Figure 4: Press-locked steel grating for wall cladding
The features of the two gratings are similar. You can choose according to your own will.
Figure 5: Welded steel grating fixed by pressure resistance welding.
Figure 6: Press-locked grating fixed through the pressure to make the cross bar into the pre-open flat steel.
When you choosing materials, you must consider the expected use of the grating. Is it used only for grating walkways? Or a shelf? Does the vehicles need to pass through the gating? In these cases, you must ensure that the grating has adequate strength to ensure the correct choice of materials.
Each material has its unique characteristics and applications. Here we’d like to introduce it briefly to help you choose the right material.
Material Features Application Galvanized steel Economical, high strength, excellent corrosion resistance Suitable for platforms and walkways in petrochemical, power plants, municipal engineering, etc. Low carbon steel Economical, excellent ductility, great welding and stamping properties. Suitable for municipal construction, interior decoration, building materials, platform aisles, etc. 304 stainless steel Great corrosion resistance, heat resistance and high tensile strength Suitable for chemical plants, food plants, power plants and wastewater treatment and other applications require high temperature operations. 316 stainless steel Compared with 304 stainless steel, it has better corrosion resistance and pitting resistance, greater heat resistance For chemical, pulping and paper processing, textile equipment, petroleum refining, etc. Aluminum Light weight, great corrosion resistance and attractive appearance Widely used in indoor ceilings, outdoor curtain walls, other decorative applications and mechanical equipment maintenance platforms.The common mesh size of welded steel gratings is 33 mm × 33 mm and 34 mm × 38 mm. According to the different load, place, use, method of application and the requirements of customer, there are different ways to divide grating mesh.
Figure 7: Larger mesh allows more light to pass through.
Figure 8: Smaller mesh prevents objects from falling off.
Figure 9: Galvanized welded bar grating.
Figure 10: Powder coated steel grating.
Generally speaking, there are two kinds of surface shape of grating. One is smooth and the other is serrated. We usually make the grating surface into serrated to increase the performance of anti-slip.
Figure 11: Smooth surface welded steel grating.
Figure 12: Serrated surface welded steel grating.
For more information, please visit bearing bar grating.