Spiral wound gasket CGI type ASME B16.20

Description

Product Overview
Spiral wound gasket CGI type ASME B16.20 is a precision-engineered metal/graphite sealing element designed for high-pressure, high-temperature flange applications. It combines layered metal windings with a controlled filler (graphite or flexible non-metallic) to deliver robust, leak-tight performance for pipeline, valve, heat exchanger, and pressure vessel interfaces. The gasket offers resilient recovery, stable sealing across thermal cycles, and compatibility with standard ASME B16.20 flange geometry, reducing unplanned downtime and maintenance costs. For industrial buyers, it is a strategic sealing solution that minimizes fugitive emissions, supports regulatory compliance, and extends mean time between maintenance events.

Key Specifications & Technical Characteristics

• Standard: Manufactured to ASME B16.20 specifications for spiral wound gaskets.

• Materials (winding): Carbon steel (CS), stainless steel 304 (SS304), stainless steel 316 (SS316), Inconel (on request).

• Filler material: Flexible graphite (high-purity expanded graphite) standard; PTFE or ceramic-filled PTFE available for aggressive chemistries.

• Inner/outer rings: Carbon steel, SS304, SS316 or alloy rings available to aid centering and prevent inward buckling.

• Facing/finish: Rounded/flat contact faces per flange class, optional protective coating for corrosion resistance.

• Size range: ANSI/ASME flange sizes from 1/2″ to 48″ and larger custom sizes on request.

• Pressure-temperature rating: Engineered for standard ASME pressure classes (150–2500 lb); suitable for temperatures from cryogenic up to >600°C depending on filler and metal selection.

• Dimensional tolerances: Manufactured within ASME-specified tolerances for radial and axial dimensions to ensure flange fit and sealing reliability.

• Physical characteristics: Composite construction; typical thickness range 3 mm–12 mm depending on design; density varies by metal and filler selection (graphite filler density ~0.7–1.0 g/cm³).

• Chemical resistance: Graphite filler exhibits excellent resistance to acids, hydrocarbons, steam, and many solvents; PTFE filler for strong alkalis and halogenated media.

• Shelf life: Indefinite for metal components; store in dry conditions to preserve graphite filler integrity (recommended storage: dry, ambient warehouse).

• Packaging: Bulk pallets for large orders, wooden crates for export, individual protective wrapping for each gasket to prevent mechanical damage.

• Traceability: Material certificates, batch/heat number traceability, and inspection reports supplied per order.

Core Industrial Applications

• Oil & Gas: Pipeline flanges, compressor and pump connections, valve bodies—seals under high pressure, high temperature, and sour service when specified with appropriate metallurgy.

• Petrochemical & Refining: Heat exchangers, reactor vents, and process piping where chemical resistance and thermal cycling tolerance are critical.

• Power Generation: Steam lines, turbine and boiler flanges requiring high-temperature sealing and long service life.

• Chemical Manufacturing: Corrosive process lines and storage vessels using PTFE-filled or corrosion-resistant metal options.

• Water Treatment & Desalination: High-pressure feedwater and brine lines where reliability reduces leakage risk and operational disruption.
  Why it outperforms alternatives:

• Resilience and recovery: Spiral wound design maintains seal integrity through thermal expansion/contraction cycles better than compressed sheet gaskets.

• Wide service envelope: Material combinations enable use across broader temperature and chemical ranges than many single-material gaskets.

• Reusability and flange protection: Properly installed and inspected spiral wound gaskets can be removed and re-used in maintenance cycles more reliably than low-cost alternatives, lowering life-cycle cost.

Competitive Advantages

• Quality consistency: Produced to ASME B16.20 with QA/QC processes, material certificates, and batch traceability to ensure repeatable performance.

• Supply reliability: Bulk inventory management and planned production schedules support consistent lead times for repeat B2B procurement.

• Logistics capability: Export-ready packaging, containerized shipping configurations, and regional distribution options from Buea (Cameroon) to key global hubs.

• Price competitiveness: Scalable manufacturing and standardized material options reduce per-unit costs for large-volume buyers while preserving specification fidelity.

• Sustainability: Durable design reduces frequency of replacements and associated waste; optional selection of recyclable metal components minimizes lifecycle environmental footprint.

• Technical support: Detailed product datasheets, installation torque recommendations, flange compatibility charts, and third-party test/certification documentation available on request to support engineering procurement and compliance reviews.

Commercial & Supply Information

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

• Loading capacity (MT per container): Typical 20-foot container loading capacity ~20–22 MT; 40-foot container loading capacity ~24–26 MT, depending on packing configuration and gasket dimensions.

• Lead times: Standard lead times provided on quotation; expedited production available for prioritized orders (confirm at time of enquiry).

• Documentation: Mill test certificates, ASME compliance documents, packing lists, and commercial invoices provided with shipments.