Alloy Steel Flanges to ASTM A182 & DIN Standards – Reliable Performance in High-Stress Systems

Product Introduction:

TOBO’s Alloy Steel Flanges are engineered for demanding industrial environments where high pressure, extreme temperatures, and corrosive media are common. Manufactured in strict accordance with internationally recognized standards, including ASME B16.5 (USA) and DIN EN 1092-1 (Germany), these flanges deliver consistent mechanical properties and precise dimensional accuracy. Each piece undergoes rigorous quality control to ensure reliability in critical applications such as oil and gas, petrochemical, power generation, and pressure vessel systems. With a focus on durability and long-term service life, TOBO provides a trusted solution for engineers and procurement professionals worldwide.

1. Product Description
   These flanges are forged from high-grade alloy steel, offering superior strength and resistance to thermal fatigue. Available in various types including weld neck, slip-on, blind, socket weld, and threaded, they are designed to meet diverse piping connection requirements with precision machining and smooth sealing surfaces.

2. Key Parameters
   Material grades include ASTM A182 F5, F9, F11, F22, and F91. Pressure ratings range from Class 150 to Class 2500 under ASME B16.5, and PN6 to PN100 under DIN EN 1092-1. Sizes typically span from 1/2″ to 48″ (DN15 to DN1200), with custom dimensions available upon request.

3. Applications
   Widely used in high-temperature steam lines, refinery cracking units, chemical processing plants, and high-pressure hydraulic systems. They are also essential in power stations, offshore platforms, and natural gas transmission networks where safety and resistance to oxidation and sulfidation are critical.

4. Advantages
   TOBO ensures full material traceability with mill test reports certified to EN 10204 3.1. Advanced heat treatment processes guarantee consistent microstructure and mechanical properties. Strict dimensional inspection and NDT methods such as ultrasonic and penetrant testing further enhance product reliability.

5. Functions
   These flanges provide secure, leak-proof connections between pipes, valves, and equipment while allowing for easy assembly, disassembly, and maintenance. Their alloy composition ensures stable performance under thermal cycling and mechanical vibration, reducing the risk of premature failure in mission-critical systems.

Payment & Invoicing

First-Time Clients: 50% advance payment, 50% balance before shipment. Strategic Clients: 30% advance, 70% payment against copy of Bill of Lading. Long-Term Agreements: 60-day credit terms available (subject to credit approval). Invoicing: 13% VAT Special Invoice provided; FORM A Certificate of Origin for exports. fication System: Laser marking includes material code, pressure rating, and flow direction arrows.

FAQ

1. Are you trading company or manufacturer ?
We are manufacturer ,You can see the Alibaba certification.
2. How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
3. Do you provide samples ? is it free or extra ?
Yes, we could offer the sample for free charge but need pay the cost of freight.
4. What is your terms of payment ?
Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.