Representation method for metal wound gaskets!
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How do you denote metal wound gaskets? For example: DN100 150LB t=4.5 D2232 indicates a metal wound gasket with inner and outer rings, both made of 304 material; the gasket itself is composed of 304+4F. Does D1131 mean that both the inner and outer rings are made of 0Cr13, while the gasket is made of 0Cr13+4F? For D2222, both the inner and outer rings are 304 material, and the gasket is 304+flexible graphite. How is a metal wound gasket with an inner ring denoted? Is it C232, with the inner ring being 304 material and the gasket being 304+4F? And how is a metal wound gasket with an outer ring denoted? Is it B232, with the inner ring being 304 material and the gasket being 304+4F? There is also another way of notation: DN100 150LB 304/Graf/OR:CS 4.5T for those with an outer ring; DN100 150LB 304/Graf/IR:CS 4.5T for those with an inner ring; DN100 150LB 304/Graf/IR:SS,OR:CS 4.5T for those with both inner and outer rings. Feel free to share your opinions!
Pages 398 and 399 of HG20631-2009, four-digit material code
We use the four-digit code specified in HG/T 20592~20615-2009 for representation.
First letter: A: Basic type. B: Only with the inner ring C: Only with the outer ring D: With the southern outer ring. The first digit of the Arabic numeral indicates the material of the outer ring: 1 represents low-carbon steel. 2 represents 0CR18NI9; the second digit in the Arabic numerals indicates the material of the metal strip: 2 means 0 chromium 18 nickel 9 ； 3 is 0 chromium, 17 nickel, 12 molybdenum, 2 (316) ； 4 represents 00% chromium, 17% nickel, 14% molybdenum, 2% (316L); the third digit of the Arabic number indicates the type of non-metallic lining: 1 denotes asbestos paper ； 2 is graphite ； 3 is tetrafluorine ； 4 is non-asbestos paper. The fourth digit of the Arabic numerals indicates the material of the inner ring: 0 means none ； 1 is low-carbon steel ； 2 is 304 ； 3 is 316 ； 4 is 316L
SH3407: The first digit indicates the inner ring; 1 does not denote low-carbon steel, but rather 0CR13
Examples of material codes (see table for details): 1, 2, 2, 0 – Material code for the inner ring (e.g., 0 means no inner ring); Material code for the filling strip (e.g., 2 refers to flexible graphite strip); Material code for the metal strip (e.g., 2 denotes 304 steel strip); Material code for the outer ring (e.g., 1 indicates a carbon steel outer ring). Standards: HG020631, HG20610, GB4622.2. Table of codes for the inner and outer rings of wound gaskets, metal strips, and non-metallic filling materials. Outer ring material: Metal material; Filling material. Inner ring: Name, Code; Name, Code; Name, Code; Name, Code. No positioning ring: 0; 0Cr13. 1: Asbestos; 1: No inner ring. 0: Low-carbon steel; 1: 0Cr18Ni9 (304). 2: Flexible graphite; 2: Low-carbon steel; 1: 0Cr18Ni9 (304). 2: 0Cr17Ni12Mo2 (316). 3: Polytetrafluoroethylene; 3: 0Cr18Ni9 (304). 2: 00Cr17Ni14Mo2 (316L). 4: Non-asbestos fibers; 4: 0Cr17Ni12Mo2Ti (316); 3: 0Cr25Ni20 (310S). 5: Thermal ceramic fibers; 00Cr17Ni14Mo2 (316L); 4: 0Cr18Ni10Ti (321). 6: 0Cr25Ni20 (310S); 5: 0Cr18Ni12Mo2Ti. 7: 0Cr18Ni10Ti (321); 6: 00Cr19Ni10 (304L). 8: 0Cr18Ni12Mo2Ti; 7: 00Cr19Ni10 (304L). 8: Others. Others. Others. Others. 9: Note: Users can specify codes for other materials as well.