Manufacturing Record

Long Weld-Neck Flange

An integrally forged long-neck flange that improves connection strength and stiffness in demanding systems.

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Engineering case

Engineering challenge, manufacturing response and verified result

Component application, material and performance requirements are translated into defined manufacturing controls and documented verification.

01Project context

Component: Long Weld-Neck Flange

Dimensions & Weight: Project-specific

Application

Pipelines, hydraulic equipment and forging presses

Material

Carbon or alloy structural steel

Performance & acceptance points

Integral forged neck and disc
High connection rigidity

02Engineering problem

Challenge

For Pipelines, hydraulic equipment and forging presses, the Long Weld-Neck Flange must use Carbon or alloy structural steel at project-specific dimensions and weight while meeting Integral forged neck and disc; High connection rigidity. The engineering challenge is coordinated control of metal flow, section uniformity and internal integrity.

03Manufacturing response

Manufacturing Scope

01Material & heat review02Heating & open-die forging03Post-forging heat treatment04Rough & finish machining05NDT & property testing06Final inspection & packing

Core Manufacturing Strategy

YL Solution

The forming strategy controls metal flow, section uniformity and internal integrity. Heating practice, deformation sequence, forging reduction, heat treatment and machining allowance are coordinated with defined material, dimensional, NDT and property release points.

Forming capabilityOpen-die hydraulic presses and project-specific tooling

Heat treatmentPost-forging heat treatment aligned to material and property targets

MachiningHeavy turning, milling and project-specific finishing

Inspection controlChemistry, mechanical properties, NDT and dimensional inspection

04Verified delivery

Result / Verification

Delivery basis: Machined condition. Integral forged neck and disc; High connection rigidity are incorporated into the project inspection plan, with final inspection records and the quality dossier supporting acceptance and release.