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Your Professional Manway Cover Supplier

 

Hebei Guoneng Pipe Industry Co., Ltd. is a large-scale export enterprise specializing in insulated and anti-corrosion pipes and fittings.

 

Butt welding flanges, slip-on flanges, high-pressure flanges, large-diameter flanges, special-shaped flanges, flange blind plates, stainless steel elbows, carbon steel elbows, butt welding elbows, alloy elbows, high-pressure elbows, large-diameter elbows, 180-degree elbows, 1.5D elbows, 3D elbows, 90-degree elbows, tees and crosses, pipe caps, reducers, pipe bends, manholes, power plant fittings, and other series of high, medium, and low-pressure industrial pipe fittings.

 

 
  • Manway Lid
    Manway Lid
    Flexible Customization: Supports customization of size, shape, material, and color.
    Easy Installation: Lightweight design reduces handling difficulty.
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  • Sanitary Manway
    Sanitary Manway
    Hygienic Safe: Sanitary manway is made of mirror-polished stainless steel with a dead-space-free design, easy to clean and sterilize. Complies with food and pharmaceutical hygiene standards.
    Reliable Sealing: Food-grade silicone...
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  • Horizontal Manhole Cover
    Horizontal Manhole Cover
    High Load Capacity: Manufactured from high-strength materials with clear load ratings, capable of withstanding heavy vehicle traffic and offering a long service life.
    Safe Anti-Slip Design: Surface features anti-slip patterns or...
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  • Stainless Steel Manway Lids
    Stainless Steel Manway Lids
    Easy cleaning and maintenance: The surface is treated with brushing, mirror polishing or acid washing and passivation, smooth without dead corners
    High Strength and Safety: Features a robust structural design with strong...
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  • Quick Opening Manhole Cover
    Quick Opening Manhole Cover
    Material: Usually made of high-quality carbon steel or stainless steel.
    Core Feature: Tool-free for quick opening and closing.
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  • Carbon Steel Manhole Cover
    Carbon Steel Manhole Cover
    Core Material: The main body adopts high-quality carbon steel plate, featuring high mechanical strength and good economy.
    Anti-corrosion Treatment: The surface can be subjected to galvanizing, painting, rubber lining, or other...
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Why Choose Us
Integrated Manufacturing Capability

 

We specialize in the end-to-end manufacturing of a comprehensive portfolio of pipe fittings—including elbows, tees, reducers, flanges, and couplings—leveraging advanced cold/hot forming, precision CNC machining, and automated orbital welding systems to ensure dimensional accuracy, structural integrity, and batch-to-batch consistency.
Rigorous Quality Management System

 

Our ISO 9001–certified quality framework governs every stage of production—from certified raw material procurement and in-process dimensional verification to non-destructive testing (NDT), hydrostatic pressure testing, and final third-party inspection—ensuring compliance with ASME B16.9, EN 10253, and other applicable international standards.
Global Supply Chain & Technical Support Infrastructure
Backed by extensive international export experience, we deliver reliable, project-aligned logistics execution—including customs documentation support, multimodal transport coordination, and just-in-time delivery scheduling—as well as dedicated technical assistance, remote commissioning guidance, and localized after-sales service across key markets.

 

Parameter

Category

Description

Material

Mainly includes cast iron, composite materials, and carbon steel.

Dimensions

Common diameters: 500mm to 1000mm;

Thickness: 20mm to 100mm.

Custom shapes such as round, square, and rectangular are available.

Sealing Performance

Utilizes rubber gaskets, silicone pads, etc., with waterproof rating up to IP67/IP68, ensuring water and gas leakage prevention.

Surface Treatment

Anti-slip designs (checkered plate, studded surface)

Anti-corrosion treatments (hot-dip galvanizing, epoxy coating, asphalt coating)

Operating Environment

Temperature resistance typically ranges from -20°C to 300°C; pressure resistance up to 0.6MPa;

Installation Method

Mainly includes recessed, flanged, and welded types;

 

Horizontal Manhole Cover

 

Benefits of Manway Cover

Designed to meet unique and specific application requirements


Made from AAR-approved materials to offer long-term durability and corrosion resistance


Can be used with either insulated or non-insulated manway covers


More than 80 available designs meet layout spacing requirements and permit installation of emergency sealing caps over any fitting

 

Application of Manway Cover

 

Manway covers provide an important access point for inspection and maintenance, as well as allowing for the safe handling of contents, helping to ensure the safe operation of these facilities.

Oil and Gas Industry

Pressure vessels are widely used in the processing, transportation, and storage of oil and gas.

Chemical Industry

In the chemical industry, pressure vessels are often used to store and process reactive or hazardous materials.

Power Generation Industry

Pressure vessels are commonly found in power plants, where they are used to house boilers, steam generators and other components.

 

Material of Manway Cover

Cover (Lid)

Carbon Steel (A36 / Q235)

 

Frame / Ring

Carbon Steel (welded structure)

 

Fasteners (Bolts & Nuts)

Carbon Steel or Galvanized Steel (Stainless Steel 304/316 optional)

 

 

Delivery Information
 

Packaging

Export wooden cases or plywood crates with anti-rust protection for safe transport.

 

Shipping

Sea freight for bulk orders, air freight for urgent shipments, and express courier for samples or small parts.

 

 

FAQ

 

Q: How do quick-opening manway covers work?

A: Quick-opening covers use cam-lock or swing-bolt mechanisms requiring only 1/4 to 1/2 turn instead of removing multiple bolts. They dramatically reduce opening time from 15-30 minutes to 2-3 minutes, ideal for frequent-access applications like CIP operations or batch processing.

Q: What's the difference between pressure and non-pressure manway covers?

A: Pressure manway covers are designed per ASME Section VIII for internal pressure/vacuum service, featuring heavier construction, reinforced design, and code-compliant calculations. Non-pressure covers are for atmospheric tanks with lighter weight and simpler construction. Always specify operating pressure and vacuum conditions.

Q: What size manway cover do I need for my tank?

A: Standard personnel entry requires minimum 18" diameter (457mm clear opening). For comfortable access, use 20" or 24" covers. Equipment installation needs may require larger rectangular or oval designs. OSHA confined space entry standards recommend adequate sizing for emergency rescue.

We're well-known as one of the leading manway cover manufacturers and suppliers in China, featured by quality products and good price. Please rest assured to buy high-grade manway cover for sale here from our factory. Customized orders are welcome.

pressure manway, steel manway, Sanitary Manway
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