Stainless steel flange model meaning

In life, we will find that you see the regular stainless steel flange, each outer ring above will have some capital letter marks, these obvious steel marks, is to let us distinguish between the flange, different letters represent different meanings, different pressure values and diameters, stainless steel flange manufacturers take you to understand, so that you see the next time, Can accurately distinguish different flanges.

There are generally eight positions, representing different meanings. Let's just take the numbers and say 123-45678

The position of 1 represents the standard number:

All types of pipe flanges are uniformly marked with the standard number of this standard :HG20592

The position of 2 represents stainless steel flange type type code as specified in Table 5.0.1.

The threaded flange is marked "Th(Rc)" or "Th(Rp)" when the taper pipe thread is used in accordance with GBT7306.

The threaded flange is marked "Th(NPT)" when threaded according to GB/T12716 taper pipe thread;

If the thread flange is not marked with thread code, it is Rp(GB/T7306.1).

The position of 3 is stainless steel flange nominal diameter DN(mm) and applicable steel pipe outside diameter series:

Integral flange, flange cover, lining flange cover, threaded flange, applicable to the outer diameter of the steel pipe series can be omitted;

Applicable to the flange of the international general series of steel pipe (commonly known as British pipe), applicable to the outer diameter of the steel pipe series can be omitted;

Applicable to the flange of the domestic series of steel pipe (commonly known as metric pipe), marked "DN(B)".

4 position for stainless steel flange nominal pressure PN,MPa.

5 refers to the type code of sealing surface. According to the provisions of Table 6.0.1, the protrudate flange, such as the car dense-grain waterline, is marked as "RF(A)".

6 is according to the steel pipe wall thickness provided by the user.

Neck butt welding flange, butt welding ring loose sleeve flange should be marked with steel pipe wall thickness.

7 indicates the brand of the material.

8 stands for others. Use requirements or additional requirements that are different from those specified in this standard series, such as surface roughness of sealing surface, etc

How to get a general understanding through the above explanation? Let's test you today!

A flange with a steel mark that read:

HG20592 Flange Sw25-5.9RF316

First cover the answer with both hands

Answer: Nominal diameter 25mm, nominal pressure 5.9MPa, with British pipe welded steel pipe flange, the material is 316

How about your idea and the answer?

The above is about stainless steel flange specifications how to understand the introduction, I hope to help you.