LWN Flange

2.4663 N06617 Long Weld Neck Flange

Description

The 2.4663 N06617 Long Weld Neck Flange is designed for critical high temperature and high pressure applications where structural integrity and creep resistance are essential. As a nickel alloy flange manufactured from Alloy 617, it is widely applied in petrochemical, power generation and advanced thermal processing systems. Shawwinox operates as an Engineered Alloy Materials Integrated Supply Chain Partner, coordinating sourcing, manufacturing, inspection and delivery in line with EPC project requirements.

Material Characteristics and Engineering Application

The 2.4663 N06617 Long Weld Neck Flange is produced from a solid forging structure in accordance with EN 10222-5 or equivalent ASTM specifications. Alloy 617 is characterized by excellent oxidation resistance, high temperature strength and stability under long-term thermal exposure above 700°C. Compared to standard stainless steels or duplex grades, this material is specifically selected for service conditions involving thermal cycling, pressure fluctuation and aggressive environments.

The long weld neck geometry ensures smooth stress transition from pipe to flange, reducing local stress concentration and improving fatigue resistance. In high integrity systems such as reformers, heat exchangers and pressure vessels, this configuration supports long service life and minimizes the risk of weld-related failures.

Design Standard and Dimensional Control

The 2.4663 N06617 Long Weld Neck Flange is typically manufactured in accordance with EN 1092-1 Type 11 or customized LWN configurations depending on project specifications. Dimensional tolerances, facing finish and bore alignment are controlled to meet EPC contractor requirements and international standards.

Each flange is machined with strict control over concentricity, weld end preparation and flange thickness. Special attention is given to long neck transition geometry to ensure compatibility with pipe welding procedures and stress analysis models. For critical projects, additional requirements such as RT, UT or PMI verification are incorporated into the inspection plan.

Manufacturing and Supply Chain Control

As an Engineered Alloy Materials Integrated Supply Chain Partner, Shawwinox manages the full lifecycle of the 2.4663 N06617 Long Weld Neck Flange from raw material sourcing to final delivery. Forgings are produced by qualified mills with controlled heat treatment processes to ensure uniform microstructure and mechanical properties.

Manufacturing includes forging, heat treatment, rough machining, final machining and marking. Each stage is documented and traceable. For EPC projects, production is aligned with approved vendor lists and project-specific documentation requirements. Shawwinox coordinates mill selection, capacity allocation and production scheduling to meet delivery timelines without compromising quality.

Inspection, Testing and Documentation

The 2.4663 N06617 Long Weld Neck Flange is supplied with full inspection and testing documentation in accordance with EN 10204 3.1 or 3.2 certification. Inspection scope typically includes chemical analysis, mechanical testing, dimensional inspection and non-destructive testing such as PT, UT or RT when required.

Traceability is maintained from raw material heat number through final product marking. Third-party inspection by SGS, BV or TÜV can be arranged to witness key tests and verify compliance. Detailed documentation packages support project quality control processes and final material release.

For more information on inspection procedures, refer to our Project Reference and QA/QC pages where typical inspection workflows and documentation practices are presented in an EPC project context.

Application in EPC Projects

The 2.4663 N06617 Long Weld Neck Flange is typically used in high temperature piping systems, pressure vessels, heat exchangers and reformer units. Its application is common in oil and gas processing, petrochemical plants, power generation facilities and advanced thermal systems.

In EPC project environments, material selection is driven by operating temperature, corrosion resistance and lifecycle cost considerations. Alloy 617 long weld neck flanges are selected where conventional materials cannot meet long-term performance requirements. Shawwinox supports EPC contractors and project owners by providing engineered alloy materials that meet both technical specifications and supply chain reliability requirements.

Integrated Supply Capability

Shawwinox provides the 2.4663 N06617 Long Weld Neck Flange as part of a broader engineered alloy materials portfolio including pipes, fittings, forgings and plates. This integrated supply capability reduces procurement complexity and ensures consistency across project materials.

By coordinating manufacturing resources and inspection processes, Shawwinox enables efficient project execution while maintaining compliance with international standards and project-specific requirements. More details on related products can be found in our Engineered Alloy Materials Products section.