Spiral Wound Gasket ASME Class 300/600 RF (CGI type)

Description

1. Product Overview

The Spiral Wound Gasket ASME Class 300/600 RF (CGI type) is a high-performance metallic gasket engineered for bolted flange joints in high-pressure, high-temperature piping and vessel systems. Designed to meet ASME pressure-class requirements and Raised Face (RF) flange configurations, it provides reliable sealing where flange face damage, thermal cycling, and aggressive media are present. The primary value proposition is a robust combination of metal strength and resilient filler material that maintains tightness across cycles, minimizing leak risk and unplanned downtime. For procurement and engineering teams, this gasket is strategically important as a low-risk, long-life sealing solution that aligns with industry standards for safety, performance, and regulatory compliance.

2. Key Specifications & Technical Characteristics

• Construction: Spiral-wound metallic core with concentric metal winding and flexible filler (CGI type).

• Metal components: Inner and outer windings typically stainless steel (SS304 / SS316) or corrosion-resistant alloys on request.

• Filler material: Graphite-based flexible filler (CGI) — expanded graphite suited for broad temperature ranges; PTFE or other fillers available on request.

• ASME rating: Class 300 and Class 600 compliance for RF (Raised Face) flange applications.

• Dimensions: Available in standard ASME flange sizes (ANSI B16.5 / B16.47), thickness and cross-section per customer specification.

• Temperature range: Typical graphite-filler service from approximately -200°C to +450°C (application dependent; verify with material selection).

• Pressure capability: Engineered for the sealing requirements of ASME Class 300 and 600 pressure ratings.

• Face type compatibility: Raised Face (RF) flange designs.

• Physical characteristics: Metallic windings (silver/metallic finish), graphite filler (dark grey/black), wound geometry provides spring-like resilience.

• Tolerances: Manufactured to industry tolerances for concentricity, density, and cross-section; available with center-ring for internal pressure containment.

• Surface finish & coatings: Standard non-coated metal; anticorrosion coatings or special alloys available on request.

• Packaging options: Individual gasket in protective wrap and carton; bulk wooden crates or palletized packaging for larger orders; protective desiccant available on request.

• Shelf life: Indefinite when stored dry and protected from mechanical damage and corrosive atmospheres; recommended storage in original packaging at ambient conditions.

• Traceability: Material mill certificates and batch traceability available upon request.

3. Core Industrial Applications

• Primary industries: Oil & gas (upstream, midstream, downstream), petrochemicals, power generation (steam and combined-cycle), chemical processing, LNG, refining, and marine/shipbuilding.

• Typical use cases: Flange sealing on high-pressure piping, heat exchangers, pressure vessels, reactor connections, turbine casings, and pipeline joints where sustained sealing under cyclic load is required.

• Performance vs. alternatives: Compared with full-metal ring gaskets, spiral-wound gaskets with graphite filler provide superior conformability to flange imperfections and better resilience under thermal cycling. Versus soft non-metallic gaskets (e.g., pure PTFE sheets), they offer higher pressure and temperature capability and improved creep resistance.

• Operational advantages: Rapid installation, reduced retightening frequency, effective sealing against fugitive emissions and corrosive media (when appropriate alloys/fillers selected), and longer service intervals—translating to lower total cost of ownership.

4. Competitive Advantages

• Quality consistency: Manufactured to ASME and industry standards with strict quality controls and batch testing to ensure concentricity, filler density, and sealing performance.

• Supply reliability: Production capacity aligned with industrial demand profiles; stored inventory for common sizes to support expedited lead times.

• Logistics capability: Palletized and container-ready packaging, export-grade crating, and coordination with freight partners for bulk shipments worldwide.

• Price competitiveness: Cost-effective for mid- to long-term lifecycle cost due to durability and reduced maintenance; volume pricing and contract-sourcing options available.

• Sustainability: Recyclable metallic components; long service life reduces replacement frequency and material waste. Options for low-impact packaging and responsible sourcing of base metals on request.

• Technical support: Engineering data sheets, installation and torque guidance, material certificates, and service-life estimation provided. Customized material selection and gasket design consulting available for critical applications.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): BULK 20MT.

• Loading capacity (MT per container): Typical 20’ container loading capacity up to approximately 20–22 MT depending on packaging and palletization; 40’ container capacity up to approximately 24–26 MT. Exact loading depends on packing configuration and should be confirmed at time of order.