Company Introduction

Established in 1997, Jiangsu Liangyi Co., Limited is a premier open die forging manufacturer based in China. For over two decades, we have been dedicated to delivering superior forged components to a global market, proudly exporting our products to clients across the Americas, Europe, Asia, and beyond.

We operate a comprehensive, end-to-end manufacturing facility. From raw material selection, forging, and heat treating to precision machining, testing, and final inspection, our integrated processes ensure every component meets the highest industry standards.

Our Team & Technical Strength
Our greatest asset is our highly skilled workforce. We employ a dedicated team of 460 professionals, ensuring unmatched technical expertise at every stage of production:

9 Senior Engineers
32 Intermediate Engineers
140 Specialized Technicians
Quality Assurance & Certifications
Quality is the cornerstone of Liangyi. Operating under a strict, high-standard quality control policy, our forging products have earned widespread recognition and certifications from leading international classification societies, including:

CCS (China Classification Society)
BV (Bureau Veritas)
DNV (Det Norske Veritas)
LR (Lloyd's Register)
NK (ClassNK)
Industries & Applications
Our durable, precision-engineered products are trusted across the world's most demanding sectors:

Oil & Gas: Specialized components including wellheads and subsea Christmas trees.
Petroleum & Chemical Industry
Power Generation
Shipbuilding & Marine Engineering
Heavy Machinery
Comprehensive Material Capabilities
We possess the capability to forge an exhaustive range of steel grades and specialty alloys to meet the precise metallurgical requirements of your projects:

Alloy & Carbon Steel: Comprehensive coverage of ASTM, ASME, AISI, and EN standards (e.g., A181, A516, SA336, A182, SA-350, 4140, 4340, P-series, S-series, and 16Mo3).
Stainless Steel: Austenitic, Martensitic, Duplex, and Super Duplex grades (e.g., 304/L, 3