Carbon Steel Pressure Manhole Cover

Carbon Steel Pressure Manhole Cover

Product Overview

The Carbon Steel Pressure Manhole Cover is a heavy-duty access component engineered for pressurized vessels, industrial boilers, and high-stress storage tanks. Unlike standard atmospheric covers, this unit is specifically designed to withstand significant internal pressure and vacuum conditions while maintaining a secure, leak-tight seal. Fabricated from high-grade carbon steel (such as Q235B or ASTM A516), it offers the tensile strength and structural integrity required for demanding applications in the oil & gas, power generation, and chemical processing industries.

Key Features and Benefits

• High-Pressure Resistance: Engineered to operate safely under pressure (e.g., PN6, PN10, PN16, or higher), preventing accidental opening or failure during pressure surges.

• Robust Material Construction: Made from premium carbon steel, providing superior mechanical strength and impact resistance compared to stainless steel or cast iron alternatives.

• Secure Sealing Mechanism: Features reinforced flanges and heavy-duty bolting or swing-bolt designs to ensure uniform gasket compression and a tight seal against leaks.

• Cost-Effective Durability: Carbon steel offers an excellent balance of performance and cost, making it the economical choice for large-scale industrial infrastructure where extreme corrosion resistance is not the primary concern.

• Protective Coatings: Typically treated with anti-corrosion coatings such as red oil, black varnish, or galvanization to enhance longevity in harsh environments.

Technical Specifications

• Product Name: Carbon Steel Pressure Manhole Cover

• Material Grades: Q235B, ASTM A516 Gr. 60/70, ASTM A234 WPB.

• Size Range: DN300 (12") to DN600 (24") and custom sizes.

• Pressure Ratings: PN6, PN10, PN16, PN25, ANSI 150, ANSI 300.

• Flange Standards: ASME B16.5, HG/T 21515, DIN 2633, JIS B2220.

• Gasket Materials: Asbestos-free rubber, Graphite, PTFE, Spiral Wound.

• Surface Treatment: Red Oil, Black Paint, Galvanized, or Epoxy Coated.

Applications

The Carbon Steel Pressure Manhole Cover is widely utilized in sectors requiring robust pressure containment:

• Oil & Gas and Petrochemical: High-pressure separators, scrubbers, and storage tanks.

• Power Generation: Boilers, steam drums, and heat exchangers.

• Chemical Processing: Reactors and pressure vessels handling non-corrosive or mildly corrosive media.

• Water Treatment: High-pressure filtration systems and supply networks.

• HVAC and Heating: District heating pipelines and thermal energy storage tanks.

Quality Assurance

We strictly adhere to international manufacturing standards to ensure the safety and reliability of every pressure manhole cover. Our production process includes rigorous material testing, dimensional inspection, and pressure load testing. We provide full traceability and documentation, including EN 10204 3.1 Mill Test Certificates, to guarantee compliance with ASME, PED, and other relevant industry codes.