SS316 Oval Ring Gasket SS316L Ring Gasket ASME B16.20

Professional manufacturer and exporter of SS316 Oval Ring Gasket SS316L Ring Gasket ASME B16.20 in China.

An SS316 Oval Ring Gasket is a type of metallic gasket commonly used in high-pressure and high-temperature applications to ensure leak-proof sealing between flanged connections. It is used for Ring Type Joint (RTJ) flanges  connection and  manufactured from stainless steel 316L (SS316).

There are some different shapes in RTJ (Ring Type Joint) Gasket,Oval, Octagonal.

Oval ring gasket is one of most common type in ring gasket. 

Material: Metal, usually made from soft iron stainless steel, carbon steel, or alloys like Inconel, Monel, or Titanium.

Chemical Composition of 316 Stainless Steel Ring Gasket

Element Composition (%)
Iron (Fe) Balance (approx. 65-70%)
Chromium (Cr) 16.0 – 18.0
Nickel (Ni) 10.0 – 14.0
Molybdenum (Mo) 2.0 – 3.0
Manganese (Mn) 2.0 – 3.0
Silicon (Si) 0.75 max
Carbon (C) 0.08 max
Phosphorus (P) 0.045 max
Sulfur (S) 0.03 max
Nitrogen (N) 0.10 max

Typical Hardness Range of 316 Ring gasket

  1. Brinell Hardness (BHN):
    • Max 160BHN.
  2. Rockwell Hardness (HRB):
    • Max 83

Dimensions and Standards forSS316 Oval Ring Gasket

SS316 Oval Ring Gaskets are manufactured to the following standards:

  1. API 6A: For wellhead and Christmas tree equipment.
  2. ASME B16.20: ASME B16.20 covers metal ring-joint gaskets, spiral-wound metal gaskets, and grooved metal gaskets with covering layers and offers comprehensive solutions

Marking and Identification

An SS316 Oval Ring Gasket is typically marked with:

  • Material grade: SS316.
  • Manufacturer Logo.
  • Ring-joint gaskets shall be identified by an R, RX, or BX number that relates to flange size (NPS), pressure class, and the appropriate flange standards (ASME B16.5, ASME B16.47, API Specification 6A, or ISO 10423).

Ring gasket material and hardess details

A list of materials that can be used for metallic gaskets and the maximum acceptable hardness for these materials is given in ASME B16.20. Refer to the below table for more information.

GASKET MATERIALS BRINELL HARDNESS NUMBER (max) ROCKWELL HARDNESS NUMBER -B Scale (max) IDENTIFICATION
Soft iron 90 56 D
Low carbon steel 120 68 S
4-6% Chrome 1/2% molybdenum 130 72 F5
Type 410 Stainless Steel 170 86 S410
Type 304 Stainless Steel 160 83 S304
Type 316 Stainless Steel 160 83 S316
Type 347 Stainless Steel 160 83 S347
Type 410 Stainless Steel 170 86 S410

If you have an enquiry for SS316 Ring Gasket ,pls do not hesitate to send a mail.

Product Name: Oval Ring Joint Gasket, R77
Type: Ring Gasket
Size: 24 Inch, DN600
Pressure: Class 600 LB, PN100
Standard: ASME B16.20
Material: Stainless Steel SS 316