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Threaded Flange for Small Bore Pipe and Repair Services

Threaded flanges provide weld-free connections for small bore piping systems. Combined with professional repair and machining services, they offer cost-effective solutions for industrial maintenance and new installations.

Threaded Flange Overview

Threaded flanges connect to pipes using internal threads, eliminating the need for welding:

Key Features

• Internal threads: NPT, BSP, or PT
• No welding required
• Quick installation and disassembly
• Ideal for hazardous areas

Size Range

• Available: NPS 1/2 inch to NPS 4 inch
• DN15 to DN100 metric sizes
• Pressure classes: 150 to 2500

Thread Standards

Standard	Region	Beschreibung
NPT	North America	National Pipe Tapered
BSP	Europe/Asia	British Standard Pipe
PT	Japan	Japanese Taper Pipe

Applications for Small Bore Pipe

Common Uses

• Anschlüsse der Instrumente
• Sample points and drains
• Vent lines
• Compressed air systems
• Wasserverteilung
• Temporary installations

Vorteile

• No hot work permit required
• Safe for hazardous locations
• Easy maintenance access
• Lower installation cost
• Reusable components

Limitations

• Limited to NPS 4 and below
• Lower pressure than weld neck
• Thread corrosion risk
• Not for thermal cycling

Flange Repair and Machining Service

Professional repair services extend flange life and reduce replacement costs:

Repair Capabilities

• Face resurfacing: Repair damaged sealing surfaces
• Bore machining: Restore proper pipe fit
• Bolt hole repair: Fix stripped holes
• Weld overlay: Build up worn surfaces
• Re-drilling: Modify bolt patterns
• Thread repair: Restore damaged threads

Machining Services

• CNC machining for precision
• Large diameter boring
• Custom gasket grooves
• Special facing (RF, FF, RTJ)
• Counterboring and chamfering

When to Repair vs Replace

Damage Type	Solution
Minor face scratches	Resurface
Deep gouges	Weld overlay then machine
Cracked flange	Replace
Severe corrosion	Replace
Stripped bolt holes	Repair or replace

Flansch mit CE-Zertifizierung für den Export

European market requires CE marking and PED compliance:

Certification Package

• CE Marking per PED 2014/68/EU
• Notified Body certification (TUV, BV)
• Material certificates EN 10204 3.1
• Hydrostatic test reports
• Technical documentation file
• Konformitätserklärung

Export Standards

• ASME B16.5: Americas
• EN 1092-1: Europe
• GB/T 9115: China
• JIS B2220: Japan
• GOST: Russia/CIS

Large Diameter Flange Fabrication Service

Custom manufacturing for oversized flanges:

Capabilities

• Diameter range: DN15 to DN4000
• Maximum weight: 5 tons per piece
• Plate rolling and welding
• Segmented fabrication for very large sizes
• Custom pressure ratings

Anwendungen

• Water treatment plant headers
• HVAC main ducts
• Industrial exhaust systems
• Marine piping systems
• Power plant cooling water

Qualitätskontrolle

Inspection Procedures

• Dimensional inspection with CMM
• Visual examination per standards
• Magnetic particle testing
• Liquid penetrant testing
• Härteprüfung
• Coating thickness measurement

Documentation

• Material test reports per heat
• Berichte über Maßkontrollen
• Non-destructive testing reports
• Pressure test certificates
• Third-party inspection reports

Lead Time and Service

• Standard threaded flanges: 3-7 days
• Repair services: 5-10 days
• Custom machining: 10-20 days
• Large diameter: 20-30 days

Songhai Flange supplies threaded flanges for small bore pipe applications and provides comprehensive repair and machining services. CE certified products available for export with fast turnaround times.

WhatsApp: +86-18658777855
E-Mail: 1007788887@qq.com