Industrial Gasket Manufacturer for EPC, Power Plant & Piping Projects

✅ Professional Industrial Gasket Manufacturer in China
We are a professional manufacturer of industrial gaskets for EPC projects, power plants, petrochemical, oil & gas, water treatment, and piping systems. An industrial gasket is a sealing element placed between two flange faces to prevent leakage of liquids, gases, or steam under pressure and temperature. Our product portfolio includes spiral wound gaskets (SWG), ring type joint (RTJ) gaskets, kammprofile gaskets, non-asbestos fibre gaskets, PTFE gaskets, graphite gaskets, and metal-jacketed gaskets, manufactured in stainless steel, carbon steel, graphite, PTFE, and non-asbestos fibre materials. All products comply with ASME B16.20 (metallic gaskets) and ASME B16.21 (non-metallic gaskets), compatible with ASME B16.5 and B16.47 flanges across pressure classes 150 to 2500.

📋 Product Overview & Key Features

A gasket is the critical sealing element in every flanged joint. Its selection is governed first by the flange facing type (Raised Face, Flat Face, or Ring Type Joint), then by pressure class, temperature, and process fluid chemistry[reference:2]. Using the wrong gasket on a given flange face causes leaks or flange damage. Our gaskets are manufactured to the dimensional, material, and marking requirements of the applicable ASME standard. Key features include:

📦 Industrial Gasket Types & Applications

📋 Technical Specification

* Custom dimensions, materials, and gasket styles are available upon request for EPC project tenders.

📊 Gasket Selection Guide by Service Condition

❓ Frequently Asked Questions (FAQ)

Q1: What is an industrial gasket?
A: An industrial gasket is a sealing element placed between two flange faces to prevent leakage of liquids, gases, or steam under pressure and temperature. The gasket must deform and fill the microscopic irregularities of the flange surfaces to create a seal.

Q2: What are the main types of industrial gaskets?
A: The main types include: Spiral wound gaskets (SWG) — metal windings with soft filler; RTJ gaskets — solid metal ring for high pressure; Kammprofile gaskets — serrated core with soft facing; Non-asbestos fibre gaskets — economical soft gaskets; PTFE gaskets — chemical resistance; Graphite gaskets — high temperature; and Metal-jacketed gaskets — heat exchangers.

Q3: What is the difference between a spiral wound gasket and an RTJ gasket?
A: A spiral wound gasket (SWG) combines metal windings with soft filler, providing firm yet flexible sealing suitable for Class 150–600 and a wide temperature range. An RTJ gasket is a solid metal ring that sits in a machined groove on the flange face, achieving a metal-to-metal seal for Class 600–2500 high pressure/temperature service. RTJ gaskets cannot be used on raised-face or flat-face flanges[reference:25][reference:26].

Q4: What standards do your industrial gaskets comply with?
A: Metallic gaskets (SWG, RTJ, kammprofile) comply with ASME B16.20. Non-metallic gaskets (non-asbestos, PTFE, graphite sheet) comply with ASME B16.21[reference:27]. Dimensional compatibility is with ASME B16.5 and B16.47 flanges.

Q5: What is ASME B16.20?
A: ASME B16.20 is the American standard covering metallic gaskets for pipe flanges — specifically spiral wound, ring joint (RTJ), and kammprofile gaskets. It defines dimensions, tolerances, materials, and marking requirements[reference:28].

Q6: How do I match a gasket to my flange face?
A: Raised Face (RF) → spiral wound or soft gaskets. Flat Face (FF) → full-face soft gaskets only (never SWG on FF). Ring Type Joint (RTJ) → metallic RTJ rings (R, RX, BX)[reference:29].

Q7: What pressure classes are covered?
A: ASME pressure classes: 150, 300, 400, 600, 900, 1500, and 2500. Gasket type and material are selected to suit the class and service temperature[reference:30].

Q8: What size range do you offer?
A: ASME B16.5: NPS 1/2 to NPS 24. ASME B16.47: NPS 26 to NPS 60. Custom sizes available upon request[reference:31].

Q9: What materials are used for spiral wound gaskets?
A: Winding metal: SS 304, 316, 316L, 321, 347; Monel, Hastelloy for corrosive service. Filler: flexible graphite (standard), PTFE, non-asbestos fibre. Rings: carbon steel or stainless steel[reference:32].

Q10: What materials are used for RTJ gaskets?
A: Soft iron, low-carbon steel, SS 304/316, F5 (5Cr-0.5Mo), Monel, and Hastelloy. Material hardness must be lower than the flange groove hardness to ensure proper deformation and sealing.

Q11: What is the difference between R, RX, and BX RTJ styles?
A: R — standard oval or octagonal ring for Class 150–2500. RX — modified ring that develops higher seating stress, typically for higher pressure. BX — for extremely high pressure (API 6A wellhead service), with a different cross-section[reference:33].

Q12: When should I use a non-asbestos gasket vs a spiral wound gasket?
A: Use non-asbestos for low pressure (≤1.0 MPa) and ambient temperature general service (water, steam, gas). Use spiral wound for Class 150–600, higher pressure/temperature process piping, especially in refineries and petrochemical plants[reference:34].

Q13: What is a kammprofile gasket used for?
A: A kammprofile gasket has a serrated metal core with a soft facing layer. It is used for high-pressure and thermal cycling applications, particularly heat exchangers, where it offers excellent recovery and reduced bolt load relaxation.

Q14: What is the temperature range for industrial gaskets?
A: Range depends on material: Non-asbestos: up to ~200°C; PTFE: limited to ~260°C; Spiral wound (graphite filler): up to ~450°C; Graphite: up to ~500°C+ (non-oxidizing); Metal-jacketed: up to ~600°C[reference:35][reference:36].

Q15: How do I select the gasket material for my process fluid?
A: Match material to fluid: Hydrocarbons → SS 316 + graphite; Steam → SS 321 + graphite; Strong acids → PTFE or Hastelloy; Caustic → Monel winding; Water/utilities → graphite sheet or EPDM[reference:37].

Q15: What is the seating stress requirement for different gaskets?
A: Soft non-asbestos gaskets require only a few MPa of seating stress. Spiral wound and RTJ gaskets require much higher seating stress and must be installed with properly torqued bolts[reference:38].

Q16: What certificates are provided with your gaskets?
A: Standard: EN 10204 3.1 mill certificates. Additional services: PMI (Positive Material Identification) , hardness testing, dimensional inspection, and full heat number traceability.

Q17: What are the typical applications of industrial gaskets in EPC projects?
A: Power plants — steam and water piping; Petrochemical — process piping and equipment connections; Oil & gas — wellheads, pipelines, refineries; Water treatment — pump and valve connections; Shipbuilding — marine piping systems.

Q18: Do you support EPC projects with technical documentation?
A: Yes. We provide datasheets, dimension drawings, material certificates, and full traceability documentation for EPC project compliance. Our engineering team can review your piping class specifications and recommend the optimal gasket solution.

Q19: Can you provide custom gasket configurations?
A: Yes. We offer custom sizes, materials, gasket types, and special dimensions to meet project-specific requirements. Our engineering team works closely with EPC contractors to develop gaskets that match specific piping classes, flange facings, and service conditions.

Q20: Why is gasket marking important?
A: ASME B16.20 requires permanent marking on the gasket or packaging including manufacturer, NPS/class, gasket type, and materials. This allows field verification during pipe inspection and ensures the correct gasket is installed for each flanged joint[reference:39].

📩 Contact Us for EPC Project Pricing & Technical Support

Send your piping class specification, flange schedule, or gasket requirements. Our engineering team will reply with a customized BOM, datasheet & material certificates within 24 hours.

✉ Get Free Quote Now

WhatsApp / Zalo: +86 17856068126  |  Email: [email protected]