Oil Pipeline Fittings – Forged Steel Union | Precision CNC Machined 2" UNC Threads | Phosphating & Powder Coating

Product Short Description

As a professional forging manufacturer, our oil pipeline unions are made from low-alloy steel material and produced through advanced forging forming technology, ensuring superior mechanical properties and durability. Each union undergoes precision CNC machining to meet strict 2-inch UNC thread standards, followed by phosphating and powder coating for exceptional corrosion resistance. Designed for high-pressure and corrosive environments, these fittings are widely used in oil and gas pipeline systems.

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Product Description

Key Manufacturing Advantages

1. Low-Alloy Steel Material

High-strength low-alloy steel is selected for its excellent tensile strength (≥620MPa) and impact resistance, making it ideal for high-pressure oil pipelines and ensuring long-term reliability.

2. Forging Forming Process

Utilizing precision forging technology, the metal grain structure is denser compared to cast products, increasing strength by over 20% and eliminating defects like porosity or inclusions, ensuring performance in extreme conditions.

3. High-Precision CNC Machined Threads

Fully automated CNC machining ensures 2-inch UNC threads comply with ISO Grade 7 standards, guaranteeing leak-proof connections. Each batch undergoes CMM inspection, with thread tolerance controlled within ±0.01mm.

4. Phosphating & Powder Coating Surface Treatment

● Phosphating Layer: Enhances adhesion and wear resistance.

● Electrostatic Powder Coating: Provides uniform anti-corrosion protection, withstanding ≥500 hours of salt spray testing (ideal for offshore drilling).

5.Rigorous Quality Control

Every union is inspected before shipment:

● Thread Gauge Testing (API 5CT compliant)

● Magnetic Particle Inspection (crack detection)

● Pressure Testing (withstands ≥3000 psi)

● Coating Adhesion Test (cross-cut method, Grade 0 standard)

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