Large-diameter blind flange

Product Introduction

Large-diameter blind flanges and eight‑shaped blind flanges
This product is custom‑engineered for large‑diameter pipeline systems, offering reliable pipeline isolation and switching solutions for heavy‑duty industrial applications. It is compatible with all standard sizes from DN1200 to DN3000, with enhanced structural stability and optimized sealing performance.
Processing technology: Hot pressing, custom forging, and CNC precision machining
Specifications and dimensions: 48 inches to 120 inches / DN1200 to DN3000
Pressure rating: 150# to 9,000#, with custom-made ultra-high-pressure non-standard products available.
Material: Carbon steel, alloy steel, stainless steel, low-temperature steel, nickel-based alloys
Implementation Standard: ASME B16.47, HG/T 20615, and SH/T 3406; production may also be carried out in accordance with project‑specific technical standards.
Test items: Complete nondestructive testing (ultrasonic UT / magnetic particle MT / penetrant PT / radiographic RT), hydrostatic pressure testing, metallographic analysis, and mechanical property testing.
Applicable fields: Offshore platforms, nuclear power projects, large petrochemical plants, water treatment facilities, and pipeline terminal stations.
Customized Services

Our company offers end-to-end custom solutions for large-diameter flanges, supporting specialized forming processes, tailored material grades, and compliance with project‑specific standards. We also provide on‑demand customization of anti-corrosion coatings, product markings, and exclusive packaging, along with third‑party testing services, ensuring comprehensive support for a wide range of large‑scale industrial engineering projects.