Stainless Steel Blind Flange

These Stainless Steel Blind Flange are fastened to the open ends of pipelines or equipment with bolts and achieve complete sealing together with gaskets. Serving as a reliable supplier, manufacturer and factory, DIYE VALVE provides products whose core functions cover pipeline plugging, equipment port sealing, system pressure testing and reserved interface provision, acting as key components for flow cut-off, isolation and end closure in fluid transfer systems.

Product Introduction

1. Structural Features & Advantages

Stainless steel blind flanges have no inner bore and are solid disc-shaped as a whole. Their structure is similar to that of plate slip-on flanges (PL) but without welding bevels, and the machining precision of their sealing faces is consistent with flanges of the same specification. They can perfectly mate with plate slip-on, weld neck slip-on/weld neck flanges that comply with the same standard, DN and PN, making them the most commonly used and reliable detachable plugging solution in industrial systems. Compared with welded heads, they feature the advantages of easy installation, repeatable disassembly, and the ability to open reserved interfaces without cutting the pipeline.

2. Core Functions & Application

Their core functions include pipeline plugging, equipment port sealing, system pressure testing and reserved interface provision. As key components for achieving flow cut-off, isolation and end closure in fluid transfer systems, they are widely used in all industrial fields such as petroleum and natural gas, chemical industry, municipal engineering, electric power and energy, and are suitable for various working conditions including conventional, corrosive, extremely cold and high-pressure environments. Their plugging tightness and structural rigidity are far superior to other plugging components such as blind plates and heads.

About us

1.With years of in-depth expertise in stainless steel flanges and blind flanges, DIYE focuses on high-quality manufacturing, full-process export services and stringent quality control. We have built differentiated advantages in four core dimensions of stainless steel blind flanges: product performance, price competitiveness, export experience and quality inspection. As a professional supplier serving global markets including Russia, Europe, America and the Middle East, our products are especially suitable for harsh working conditions such as extreme cold, strong corrosion and high pressure.

2.We own a dedicated production base and a complete production line for stainless steel blind flanges, with independent control over the entire process from raw material procurement, forging and machining to surface treatment and inspection. This allows us to cut costs of intermediate links, with quotes 10%-15% lower than those of trading companies.

3. We can provide OEM and neutral packaging services according to customers' brand requirements, supporting them to expand their local markets.

FAQ

Q: What is the core function of stainless steel blind flanges, and what are the differences between them and welded heads or ordinary blind plates?

A: Their core function is the detachable sealed blocking of pipe/equipment ports, realizing flow cutoff, isolation, system pressure testing and the sealing of reserved interfaces. Compared with welded heads, they are detachable and reusable, and the interfaces can be opened without cutting the pipes, enabling more convenient maintenance. Compared with ordinary blind plates, they are forged with higher rigidity, and their sealing surfaces are precision-machined, featuring better sealing performance and pressure resistance for blocking, and are suitable for medium and high-pressure as well as corrosive working conditions.

Q: Can stainless steel blind flanges be used in matching with ordinary through-hole flanges?

A: Yes. Stainless steel blind flanges that comply with the same standard, DN and PN have completely consistent bolt hole layout, sealing surface dimensions and installation dimensions with plate flanges with flat welding, slip-on flanges and welded neck flanges. They can be directly connected, and the bolts and sealing gaskets are also universal without additional adaptation.

Q: What are the mainstream applicable standards for stainless steel blind flanges, and which markets is each suitable for?

A: They mainly cover all mainstream international and domestic standards, including DIN EN 1092-1 (European/German standard, suitable for Europe and Russia), GOST 12820/12821-80 (Russian standard, exclusively for Russia and the Commonwealth of Independent States), ANSI B16.5 (American standard, suitable for the Americas and Southeast Asia), and GB/T 9119 (national standard, aligned with DIN, suitable for China and Southeast Asia). DIYE, a Chinese manufacturer, produces all specifications of the above products.