Stainless Steel Threaded Pipe Flanges

Steel Threaded Flanges (TH Flanges) are forged pipe fittings engineered for detachable connection of pipes via internal threading, eliminating the need for welding. Designed with precision-machined internal threads to mate with externally threaded pipes, they form a reliable seal when paired with gaskets and bolted to mating flanges. Key characteristics, specifications, and technical details are as follows: – Core Definition : A flange with integrated internal threads, designed for threaded connection to externally threaded pipes. Optimized for small-to-medium diameter, low-to-medium pressure systems requiring quick installation, disassembly, and maintenance without welding. – Structural Features : – One-piece forged construction – ensures structural integrity, eliminates leakage points from assembly gaps; – Precision-machined internal threads (standard thread profiles) – guarantees tight fit with threaded pipes, preventing medium leakage; – Standardized bolt hole patterns and sealing faces – compatible with mating flanges of the same standard; – Compact design – requires minimal installation space, suitable for confined or weld-restricted areas. – Material Scope : Forged carbon steel (A105, Q235B), stainless steel (304L, 316L, duplex 2205/2507), alloy steel (A182 F11/F22) – compliant with ASTM, EN, JIS standards, offering excellent corrosion resistance, mechanical strength, and compatibility with various media (liquids, gases, mild chemicals). – Key Specifications : – Size Range: DN10 – DN100 (primary small-to-medium bore focus); compatible with NPS 1/2″ – 4″ and JIS A-series 15A – 100A. – Pressure Class: PN10 – PN250 / Class 150 – 2500 (optimized for low-to-medium pressure; ultra-high pressure applications require thread integrity verification). – Thread Types: NPT (National Pipe Tapered), BSPP (British Standard Pipe Parallel), BSPT (British Standard Pipe Tapered) – matched to regional or project thread standards. – Connection Method : Threaded joint (internal flange threads + external pipe threads) + bolted joint (flange-to-flange with gasket) – no welding required, enabling rapid installation and disassembly for maintenance. – Core Advantages : – Weld-free installation – ideal for weld-restricted environments (e.g., explosive, flammable, or precision equipment areas) and reduces welding-related quality risks; – Detachable design – facilitates pipe maintenance, replacement, or system modification without cutting/damaging pipes; – Compact and lightweight – suitable for confined spaces (e.g., HVAC ductwork, industrial equipment interiors); – Forged structure delivers corrosion resistance (adapts to water, oil, mild chemicals) and long service life; – Cost-effective – lower installation and maintenance costs compared to weld neck or socket weld flanges for small-bore systems. – Application Scope : Widely used in oil & gas (instrumentation lines, low-pressure branch pipelines), chemical processing (low-pressure reagent lines, batch processing systems), power generation (auxiliary piping, control system lines), marine (shipboard auxiliary piping, HVAC systems), plumbing (building water supply/drainage), and HVAC (heating, ventilation, air conditioning) – preferred for small-to-medium bore, low-to-medium pressure systems requiring welding-free, detachable connections.