Stainless Steel Weld Neck Flanges

​Product Overview

Stainless Steel Weld Neck Flanges are engineered for high-pressure and high-temperature applications in industries like oil & gas, chemical processing, power generation, and offshore engineering. Manufactured from ​316L, Duplex 2205, and other premium grades, and compliant with ​ASME B16.5, ​EN 1092-1, and ​API 6A standards, these flanges deliver unmatched durability, leak-proof performance, and long-term reliability in extreme conditions.

​Product Specifications

​Material & Manufacturing

• Grades: 304, 316L, 321, Duplex 2205/2507, Super Duplex 32750
• Standards: ASTM A182, ASME B16.5, EN 1092-1 (Type 11)
• Surface Finish: Mirror Polish (Ra≤0.4μm), Pickling & Passivation, Shot Blasted

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Design & Dimensions

• Types: Raised Face (RF), Ring-Type Joint (RTJ)
• Hub Geometry: Tapered hub for smooth stress distribution
• Manufacturing: Seamless forged or plate-cut with CNC machining

​Size & Pressure

• Diameter Range: 1/2″ to 48″ (DN15-DN1200)
• Pressure Rating: Class 150 to Class 2500 (PN10-PN420)
• Temperature Range: -200°C to 600°C (cryogenic to high-heat applications)

​Key Advantages

✅ ​Extreme Pressure Resistance: Withstands up to ​10,000 PSI, ideal for subsea and refinery systems.
✅ ​Zero Leakage: Precision-machined sealing surfaces with 100% RT (radiographic testing) compliance.
✅ ​Corrosion Defense: Resists pitting, crevice corrosion, and H2S environments (NACE MR0175 certified).
✅ ​Custom Solutions: Special coatings (Xylan, PTFE), beveled ends, and exotic alloys (Inconel 625).

​Applications

• ​Oil & Gas: Offshore platforms, high-pressure wellheads, pipeline manifolds
• ​Chemical Plants: Reactor flanges, high-temperature acid transfer
• ​Power Generation: Steam turbine connections, boiler feedwater lines
• ​Pharmaceutical: Sterile high-purity systems (ASME BPE compliant)
• ​Cryogenic Systems: LNG terminals, liquid nitrogen pipelines

​Certifications

• ISO 9001:2015, CE, PED 2014/68/EU, API 6A (Wellhead Equipment)
• NACE MR0103/MR0175 (sulfide stress cracking resistance)
• Material Traceability (MTC) with heat treatment records

​Packaging & Logistics

• ​Export Packaging: Reinforced wooden crates with edge protectors and desiccant packs.
• ​Shipping: FOB/CIF/DDP terms; bulk order discounts for offshore projects.
• ​Lead Time: 15-25 days (standard), 30-45 days (customized).

​Why Partner With TOKO TECH?

🔹 ​Vertical Integration: In-house forging, machining, and testing facilities.
🔹 ​Technical Expertise: Free stress analysis (FEA), ASME B31.3 compliance support.
🔹 ​Quality Assurance: 100% dimensional checks, hardness testing (HRC), and PMI verification.
🔹 ​Global Track Record: Trusted by ExxonMobil, Shell, and Siemens Energy (NDA-protected case studies).