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FLANGE

Flange cover

A flange cover, also known as a Blind Flange, is a solid circular flange with no bore in the center. It is mainly used to block the end of pipelines, isolate equipment outlets, or serve as a temporary seal during system pressure testing and maintenance. The products cover the European standard system (PN series) and the American standard system (CLASS series). Types of sealing faces include Raised Face (RF), Male and Female Face (MFM), Tongue and Groove Face (TG), and Ring Joint Face (RJ). Available materials include stainless steel, duplex steel, alloy steel, and special metals such as titanium and Hastelloy. Featuring reliable sealing and easy assembly and disassembly, they are widely used in industrial piping systems for petroleum, chemical, power, pharmaceutical and other industries.

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Threaded steel pipe flange

Threaded (screwed) flanges are non-welding flanges with internal tapered or parallel

pipe threads,screwed directly onto externally threaded pipe ends.

They are widely used in low-pressure water, air, gas and oil piping systems where welding is not permitted.

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PLATE FLAT WELDED STEEL PIPE FLANGE

Flat weld steel flange, also known as plate flange or slip-on flange, is widely used for connecting pipes, valves, pumps and other equipment in industrial piping systems. It features a flat circular disc with a central bore and evenly spaced bolt holes, welded to the pipe neck for a permanent and leak-proof joint.

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Weld Neck Flange

Weld Neck Flange, also known as WN flange, is a high-integrity pipe connection flange designed for severe service conditions including high pressure, extreme temperature cycling, and cyclic loading.

It features a long tapered hub that gradually transitions from the flange thickness to the pipe wall thickness, effectively reducing stress concentration at the junction.

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ASTM A516 GR.70 Spectacle Blind Flange, Size 8inch, CL300,Raise Face End, ANSI B16.48

ASTM A516 GR.70 Spectacle Blind Flange, 8Inch, CL300, Raise Face End ASME B16.48 Standards, Figure 8 spectacle blind flange for positive pipeline isolation, carbon steel line blind to cut off or open piping flow, ideal for oil, gas and chemical industrial pipeline maintenance safety lockout.

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ANSI B16.48 FIGURE 8 FLANGE ,CARBON STEEL FLANGE

ANSI B16.48 Figure 8 Flange, Size 10 inch, Pressure Class 300, Material Carbon Steel ASTM A516 GR.50, Flange End Connect: Raised Face,Standard ANSI B16.48

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Industrial Flange Solutions: Comprehensive Guide to Blind Flanges, SO Flanges & Weld Neck Flanges

Selecting the right flange is critical for pipeline system safety and efficiency. This guide explores three essential flange types—Blind Flanges, SO Flanges (Slip-On Flanges), and Weld Neck Flanges—detailing their technical specifications, applications, and industry standards to help you optimize your projects.

1. Blind Flange: Reliable Pipeline Termination

Blind flanges are designed to seal pipe ends permanently or temporarily, ideal for pressure testing, maintenance isolation, or future system expansion.

Key Features: ASME B16.5/EN 1092-1 certified | Carbon steel/Stainless steel/Duplex options | High-pressure sealing performance
Common Uses: Oil & gas storage tanks | Water treatment systems | Industrial equipment inspection ports

2. SO Flange (Slip-On Flange): Cost-Effective Connection

SO flanges offer quick installation and budget-friendly performance for low-to-medium pressure pipelines.

Key Features: Dual-welded design for stability | Easy pipe alignment | Reduced labor costs
Common Uses: HVAC systems | Food-grade piping | Low-pressure steam lines

3. Weld Neck Flange: High-Performance for Extreme Conditions

Engineered for high-temperature and high-pressure environments, weld neck flanges ensure superior stress distribution and durability.

Key Features: Tapered hub welding technology | Fatigue-resistant design | API 6A/ASME B16.25 compliance
Common Uses: Subsea oil pipelines | Power plant boilers | Chemical processing reactors

Why Choose Our Flange Products?

✅ Global Certifications: ISO 9001, PED 2014/68/EU, and API Q1 compliant
✅ Custom Solutions: Tailored dimensions, materials (Inconel, Titanium), and face types (RF, FF, RTJ)
✅ Fast Shipping: 20,000+ in-stock flanges | 48-hour expedited delivery for urgent orders