About
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Precision Manufacturing, Global Standards
Since 1988, Sunhy has been the driving force behind critical industrial systems worldwide. Powered by 200+ advanced CNC units and a dedicated engineering team, we transform premium stainless steel into flanges and fittings that guarantee zero leakage. From standard ASME specifications to complex custom designs, we deliver precision you can trust.
Certifications
Certified Confidence for Critical Industries
In industries like Oil & Gas, Marine, and Water Treatment, compliance is non-negotiable. Sunhy’s products are rigorously tested and certified to meet the world’s most demanding standards, including ASME, DIN, JIS, and EN1092-1. Whether it’s high-pressure environments or corrosive conditions, our certified quality ensures your operations run safely and efficiently.
Your Strategic Partner for Critical Connections
In a market flooded with inconsistent quality, Sunhy stands firm. We understand that a single weak connection can cost millions in downtime. That’s why global engineers trust us. From raw material traceability to final logistics, we control every step to deliver zero-defect products, on time and within budget.
100% Traceability
We use only top-tier raw materials. Every flange comes with a full Mill Test Certificate (MTC), ensuring strict chemical composition and superior corrosion resistance.
CNC Precision
Equipped with Mazak and Doosan turning centers, we achieve micro-level tolerances. No manual grinding corrections—just perfect fit-up for your pipelines, every time.
Heavy & Scalable
From small bore fittings to 3,200mm large-diameter flanges. With a 10-ton machining capacity, we handle your biggest projects with ease and speed.
Global Logistics
Trusted by clients in 30+ countries. We offer one-stop manufacturing—from forging to shipping—saving you 3% on costs while ensuring on-time delivery.