| API R-type Gasket
The metallic ring pad is subject to forging, heat treatment and machining. It is a kind of metallic.The metallic ring pad is subject to forging, heat treatment and machining. It is a kind of metallic high-temperature, high-pressure valve covers, etc. The product is especially suitable to situations with pressure and temperature fluctuations to maintain fine sealing performance. Regular R-type pad is divided into oval type or octagonal type in terms of cross section. Standard R-type ring pad is manufactured according to API6A and ASMEB16.20 specifications. The maximum operational pressure is 10000PSI. In dovetail groove flange the octagonal pad and oval pad are interchangeable. RX-type octagonal pad is applicable for standard R-type rind pad with enhanced pressure and flange groove sealing face identical to that of the R-type.BX-type octagonal pad is applicable for systems with enhanced pressure and design application as high as 15000PSI. We provide a variety of materials and types for different design and operational requirements. Please refer to the table of material properties.
Note: When octagonal type is chosen, the material hardness of the pad should be 15~20HB lower than that of the flange face. It is recommended the pad is not recycled.
Applicable standards:
ANSI B16.5-1973 、 JPI-75-15-70 、 GB 699 、 GB1220 、 JB755 、 HG20633-97
Major forms of metallic ring pad:
Main technique parameters of metal gasket:
| Material |
Maximum hardness BRINELL |
Temperature（ ℃ ） |
Abbreviations
marker |
| Brucellosis |
Rockwell |
| Soft Iron |
90 |
56 |
-60 500 |
D |
| Low Carbon Steel |
120 |
68 |
-40～540 |
S |
| 304SS |
160 |
83 |
-250 540 |
304 |
| 304LSS |
160 |
83 |
-250 540 |
304L |
316SS
|
160
|
83 |
-200 815 |
316 |
| 316LSS |
160 |
83 |
-200 815 |
316 |
| 321SS |
160 |
83 |
-200 870 |
321 |
347SS
|
160 |
83 |
-200 870 |
347 |
| 410SS |
170 |
86 |
-40 850 |
410 |
| 5Cr-0.5Mo |
130 |
|
-29 650 |
|
| Copper |
80 |
|
-100 315 |
|
| Aluminum |
35 |
|
-200 425 |
|
| Inconel 600 |
150 |
|
-100 1095 |
|
| Incoloy 825 |
150 |
|
-100 1095 |
|
| Monel 400 |
150 |
|
-100 760 |
|
| Titanium |
215 |
|
-200 540 |
|
| Nickel 200 - |
110 |
|
200 760 |
|
| Hastelloy B2 |
230 |
|
-100 1095 |
|
| Hastelloy C276 |
210 |
|
-100 1095 |
|
Notes for Order: The following parameters shall be noted in the order of metal gasket.
Example:
1. Type of metal gasket: R
2. Shape: Octagonal
3. Flange Standard: Ha20633
4. Gasket No.: P27
5. Material: 316L
6. Hardness: HB160
7. Diameter: DN100
8. Pressure: 11MPA |
Metal Gaskets
