Rubber Round Flat Gasket
Corrosion Resistance: Can be adapted to various corrosive media based on material selection
Long Service Life: Maintains sealing effectiveness for extended periods under normal operating conditions
Spiral Wound Gasket - Key Features and Applications
Main Features
Performance Characteristics
Excellent Sealing Performance:
Adapts to various pressure and temperature conditions
01
Good Resilience:
Maintains sealing during pressure fluctuations and temperature changes
02
High Compressive Strength:
Can withstand high-pressure environments
03
Corrosion Resistance:
Can be adapted to various corrosive media based on material selection
04
Long Service Life:
Maintains sealing effectiveness for extended periods under normal operating conditions
05
Application Characteristics
Wide Temperature Adaptability:
-200°C to +800°C (depending on materials)
Broad Pressure Range:
From vacuum to 42MPa
Large Size Range:
From 1/2" to 120" or larger
Good Compatibility:
Suitable for various flange types and sealing faces
Application Areas
Industrial Applications
Petrochemical Industry: Pipes, valves, heat exchangers, reactors
Power Industry: Boilers, steam turbines, piping systems
Chemical Industry: Reactors, storage tanks, pipe connections
Pharmaceutical Industry: Sanitary piping systems
Food Processing: Food-grade pipe connections
Aerospace: High-temperature, high-pressure systems
Spiral Wound Gasket (SWG): Product Description & Core Advantages
I. Product Overview
Spiral Wound Gasket (SWG) is a high-performance semi-metallic sealing component, precision-manufactured by alternately winding V/W-shaped metal strips and non-metallic filler materials. The metal strips (acting as structural reinforcement) and filler materials (providing sealing flexibility) are spot-welded at both ends to ensure structural integrity, combining the mechanical strength of metal with the elastic sealing capacity of non-metals.
Widely recognized as the most versatile gasket for industrial sealing, it is engineered to meet the demanding requirements of high temperature, high pressure, and corrosive media environments, making it an indispensable choice for critical flange connections in global industrial systems.
Key Specifications
|
Item |
Details |
|
Executive Standards |
GB/T 4622.1-2022 (PN Series), GB/T 4622.2-2022 (Class Series), ASME B16.20, API Spec 6FB, DIN 2690 |
|
Structural Types |
Type S (Basic): No inner/outer ring (for tongue-groove flanges); Type SO (Outer Ring Only): Centering & anti-blowout; Type SI (Inner Ring Only): Corrosion protection; Type SOI (Inner+Outer Rings): Full protection (most common for RF/FF flanges) |
|
Material Options |
- Metal Strip: 304/316/316L Stainless Steel, Monel, Incoloy, Copper-Nickel Alloy: Graphite (450℃/400bar), PTFE (260℃/100bar, chemical resistance), Mica (1000℃/100bar, high temp), Non-asbestos (eco-friendly) |
|
Size Range |
Nominal Diameter: DN10-DN2000 (1/2"-80"); Pressure Rating: PN2.5-PN420, Class 150-Class 2500 |
|
Applicable Flange Faces |
RF (Raised Face), FF (Full Face), MFM (Male-Female), TG (Tongue-Groove) |
II. Core Advantages (Why Choose Our Spiral Wound Gaskets)
1. Superior Sealing Performance & Leakage Prevention
The alternating spiral structure enables the gasket to compress evenly under bolt torque, with the filler material flowing into micro-gaps and imperfections on flange surfaces (up to 0.1mm irregularities) to form a tight, impermeable seal. Even in cyclic temperature/pressure fluctuations, it maintains stable sealing, effectively preventing leakage of flammable, toxic, or corrosive media-critical for safety and environmental compliance.
2. Exceptional Temperature & Pressure Resistance
Engineered to withstand extreme operating conditions: Temperature range from -250℃ to +1000℃ (depending on filler/metal combination) and pressure up to 450 bar (6527 psi). Suitable for both cryogenic systems (e.g., LNG pipelines) and high-temperature equipment (e.g., boiler steam pipes), outperforming traditional flat gaskets in harsh 工况.
3. High Elasticity & Recovery Capacity
The V/W-shaped metal strips act as "spring-like" reinforcements, providing excellent compressibility (15-30%) and recovery rate (>80%). This allows the gasket to compensate for flange deformation caused by thermal expansion, vibration, or bolt relaxation, ensuring long-term sealing reliability without frequent maintenance.
4. Wide Chemical Compatibility
With customizable filler and metal materials, our gaskets are compatible with over 95% of industrial media, including hydrocarbons, acids, alkalis, steam, solvents, and corrosive chemicals. PTFE-filled versions offer universal chemical resistance, while graphite-filled options excel in hydrocarbon and steam service-ideal for diverse industrial needs.
5. Durability & Cost-Effectiveness
High-quality metal strips (304/316 as standard) and premium fillers ensure excellent wear resistance and corrosion resistance, extending service life by 2-3 times compared to non-metallic gaskets. Reusable after proper disassembly (with intact structure), reducing replacement frequency and total ownership cost.
6. Easy Installation & Versatility
Precision-manufactured inner/outer rings (for SO/SOI types) ensure accurate centering during installation, preventing gasket displacement or "blow-out" under high pressure. Compatible with all major flange standards (GB, ASME, DIN) and diverse industrial equipment, eliminating the need for custom tooling-saving time and labor costs.
III. Typical Application Industries
Oil & Gas/Petrochemical: Pipelines, reactors, pressure vessels, refineries (hydrocarbons, crude oil, corrosive intermediates)
Power Generation/Nuclear: Boiler steam pipes, heat exchangers, turbine systems (high temp/pressure steam)
Chemical & Pharmaceutical: Reactors, storage tanks, piping systems (acids, alkalis, solvents; food-grade PTFE options for pharma)
Marine/Offshore: Ship engines, offshore platforms, marine pipelines (saltwater corrosion resistance)
HVAC & Industrial Equipment: Valves, pumps, compressors, flange connections in general machinery
We adhere to ISO 9001 quality management system and provide MTC (Material Test Certificate) for each batch. Customization for special media, extreme temperatures, or non-standard sizes is available. Contact us for free samples and technical consultations!
Spiral Wound Gasket (SWG) - Technical Specifications
(Universal for Foreign Trade, Compliant with Global Industrial Standards)
I. Basic Parameters
|
Parameter |
Details |
|
Product Name |
Spiral Wound Gasket (SWG), Semi-Metallic Spiral Wound Gasket |
|
Executive Standards |
GB/T 4622.1-2022 (PN Series), GB/T 4622.2-2022 (Class Series), ASME B16.20, API Spec 6FB, DIN 2690, JIS B2404 |
|
Structural Types |
- Type S (Basic): No inner/outer ring (for TG/MFM flanges) Type SO (Outer Ring Only): Centering, anti-blowout, protects flange face- Type SI (Inner Ring Only): Prevents media corrosion, enhances sealing stability>- Type SOI (Inner + Outer Rings): Full protection (most widely used for RF/FF flanges) |
|
Applicable Flange Faces |
RF (Raised Face), FF (Full Face), MFM (Male-Female Face), TG (Tongue-Groove Face) |
II. Size & Pressure Range
|
Item |
Specification |
|
Nominal Diameter (DN) |
DN10 - DN2000 (1/2" - 80") |
|
Nominal Diameter (NPS) |
1/2" - 80" |
|
Pressure Rating |
PN2.5 - PN420, Class 150 - Class 2500 |
|
Gasket Thickness |
Standard: 3.2mm, 4.5mm; Custom: 2.0mm - 6.0mm (per requirement) |
|
Inner Ring Diameter |
Equal to flange inner diameter (±0.1mm tolerance) |
|
Outer Ring Diameter |
Matches flange bolt circle inner diameter (prevents bolt damage to gasket) |
III. Material Specifications
1. Metal Strip (Reinforcement Layer)
|
Material Type |
Code |
Temperature Range |
Key Advantages |
Typical Applications |
|
304 Stainless Steel |
SS304 |
-200℃ ~ +550℃ |
Cost-effective, general corrosion resistance |
General industrial, water, steam |
|
316 Stainless Steel |
SS316 |
-200℃ ~ +550℃ |
Superior corrosion resistance (chloride, acids) |
Chemical, marine, oil & gas |
|
316L Stainless Steel |
SS316L |
-200℃ ~ +550℃ |
Low carbon, no sensitization, strong corrosion resistance |
Pharmaceutical, food processing, corrosive media |
|
Monel 400 |
Monel |
-250℃ ~ +600℃ |
Resists acids, alkalis, seawater |
Offshore, chemical processing |
|
Incoloy 825 |
Incoloy |
-200℃ ~ +800℃ |
High temp resistance, acid corrosion resistance |
High-temperature equipment, nuclear power |
|
Copper-Nickel Alloy (CuNi 90/10) |
CuNi |
-196℃ ~ +400℃ |
Excellent marine corrosion resistance |
Marine pipelines, shipbuilding |
2. Filler Material (Sealing Layer)
|
Material Type |
Code |
Temperature Range |
Pressure Resistance |
Key Advantages |
|
Flexible Graphite |
Graphite |
-250℃ ~ +450℃ |
≤400 bar |
Good compressibility, high temperature resistance, compatible with most media |
|
PTFE (Polytetrafluoroethylene) |
PTFE |
-200℃ ~ +260℃ |
≤100 bar |
Universal chemical resistance, non-stick, food-grade compliant |
|
Expanded PTFE (ePTFE) |
ePTFE |
-200℃ ~ +260℃ |
≤150 bar |
Higher elasticity than PTFE, better sealing for low pressure |
|
Mica |
Mica |
-50℃ ~ +1000℃ |
≤100 bar |
Extreme high temperature resistance, thermal stability |
|
Non-Asbestos Fiber |
Non-Asbestos |
-50℃ ~ +350℃ |
≤200 bar |
Eco-friendly, asbestos-free, general industrial use |
IV. Mechanical Properties
|
Property |
Standard Value |
Test Method |
|
Compressibility |
15% ~ 30% |
GB/T 12622-2008 / ASME B16.20 |
|
Recovery Rate |
≥80% |
GB/T 12622-2008 / ASME B16.20 |
|
Tensile Strength |
≥4.5 MPa |
GB/T 12622-2008 |
|
Leakage Rate |
≤1×10⁻³ cm³/s (He gas, 1 MPa) |
GB/T 12622-2008 |
|
Hardness (Metal Strip) |
≤200 HB |
HRB Test |
V. Quality & Certification
- Quality Management System: ISO 9001:2015
- Product Certifications: CE, RoHS, REACH
- Material Certification: MTC (Material Test Certificate) for each batch
- Inspection Standard: AQL 0.65 (ISO 2859-1), 100% dimensional inspection, random leakage testing
VI. Customization Options
- Non-standard sizes (DN＞2000, special diameter/length)
- Custom material combinations (metal strip + filler) for extreme media/temperature
- Special outer ring materials (carbon steel, alloy steel) for heavy-duty applications
- Food-grade (FDA compliant) or high-purity fillers for pharmaceutical/semiconductor industrie
Spiral Wound Gasket: Key Features & Applications
Core Features
Superior Sealing: Tight seal for flange micro-gaps; anti-leakage even under cyclic temp/pressure.
Extreme Resistance: -250℃~+1000℃ temp range, up to 420 PN/2500 Class pressure; handles corrosive media.
High Elasticity: 15-30% compressibility, ≥80% recovery rate; compensates flange deformation.
Wide Compatibility: Fits GB/ASME/DIN flanges (RF/FF/MFM/TG); customizable materials.
Durable & Cost-Saving: Reusable, long service life; reduces maintenance frequency.
Typical Applications
- Oil & Gas, Petrochemical: Pipelines, reactors, refineries
- Power Generation: Boilers, steam pipes, turbines
- Chemical/Pharmaceutical: Corrosive media tanks, piping
- Marine/Offshore: Ship engines, offshore platforms
- Industrial Machinery: Valves, pumps, pressure vessels
piral Wound Gasket - Key Details
▼ Structure: Alternate wound V-shaped metal strip (304/316/Incoloy) + filler (graphite/PTFE/mica); SO/SI/SOI/S types for diverse flanges.
▼ Precision: Compliant with GB/T 4622, ASME B16.20; DN10-DN2000, PN2.5-PN420, 3.2/4.5mm standard thickness.
▼ Quality: ISO 9001 certified; MTC provided per batch; 100% dimensional inspection, leakage tested.
▼ Advantage: Tight seal, anti-blowout, corrosion-resistant; reusable, fits RF/FF/MFM/TG flange faces.
Spiral Wound Gasket - Production Highlights
Precision Manufacturing: Automatic winding machines + spot-welding tech; strict control of metal strip/filler tension.
Quality Control: ISO 9001 certified; batch MTC, dimensional inspection & leakage testing (100% pass rate).
Material Assurance: Premium 304/316 stainless steel, high-purity graphite/PTFE; eco-friendly & corrosion-resistant.
Capacity: Daily output 10,000+ pcs; fast lead time (7-15 days for standard orders); custom sizes available.
Spiral Wound Gasket - Packaging & Shipping
Protective Packaging:
Moisture-proof PE bags + 5-layer corrugated cartons; separate sleeves for precision gaskets.
Bulk Option:
Palletized packaging (ISPM 15 certified) for large orders; stretch film + strap fixed.
Custom Service:
Neutral/branded packaging, VCI anti-rust bags for long storage.
Shipping:
Express/Air/Sea/Rail; full export docs (B/L, CO, MTC); on-time delivery guaranteed.
After-Sales Service Process
1：Customer feedback (provide order number, product photos/videos, problem description
2：After-sales team responds within 24 hours to verify the problem type
3：Quality/specification issues: Solution (replacement/exchange/refund) provided within 48 hours
4：Technical issues: Immediate guidance; special solution provided within 1-3 working days for complex problems
5：Implement the solution and track customer satisfaction
After-Sales Guarantee Commitments
1.Response Time: Quick response to customer demands within 24 hours without delay
2.Solution Rate: 100% problem-solving rate to protect customer rights and interests
3.Transparent Communication: Synchronize the processing progress throughout to keep customers informed of each step
4.Long-term Cooperation: Dedicated after-sales specialists for long-term cooperative customers to prioritize needs.
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