How Chengrui Improved Hanoi’s Transformer Industry Through Insulation Paper Solutions

Client Background

Ms. Linh Tran, founder of Hanoi Power Solutions, a mid-sized transformer manufacturer in Vietnam’s capital, faced mounting challenges in 2023. Her company specialized in producing energy-efficient transformers for industrial clients but struggled to source high-quality electrical insulation paper locally. With Vietnam’s power infrastructure expanding rapidly, Linh needed reliable materials to meet rising demand while adhering to international safety standards like IEC 60641-2.

The Pain Points

Vietnam’s domestic suppliers offered limited insulation paper grades, often compromising on density (ranging 0.13–1.23 g/cm³) and thermal stability. Deliveries were erratic, causing production delays. Worse, some local mills used recycled fibers, risking premature transformer failures. Linh’s team also faced cost pressures, local prices fluctuated by 15–20% quarterly due to raw material shortages.

Why import electrical insulation materials from China

After evaluating suppliers in India and South Korea, Linh turned to China, where 57% of global insulation paper manufacturers operate. Chinese producers dominated the market with vertically integrated supply chains, ensuring stable pricing and bulk customization. For instance, Chengrui’s ability to tailor kraft paper thickness (0.25–4.8 mm) and dielectric strength (≥12 kV/mm) aligned perfectly with Hanoi Power’s technical specs.

Why Choose Chengrui

1.  Technical Expertise: Chengrui’s R&D team provided a 15-page material analysis report, including flame retardant tests and long term aging simulations—a service unmatched by Vietnamese competitors.

2.  Logistics Efficiency: Chengrui’s DDP (Delivered Duty Paid) model eliminated customs complexities. A 2024 shipment of 7,500 kg unbleached kraft paper arrived at Hai Phong Port within 18 days.

3.  Cost Transparency: Unlike suppliers quoting in RMB, Chengrui accepted flexible USD payments, shielding Linh from payment way trouble.

4.  Sustainability Edge: Chengrui’s FSC-certified cellulose fibers reduced carbon footprint by 30% vs. local alternatives, a selling point for Linh’s eco-conscious EU clients.

Outcome

Switching to Chengrui in Q3 2024 cut Hanoi Power’s material costs by 22% and defect rates from 8% to 0.5%. Linh secured a $2.3M contract with a Vietnamese smart grid project, citing Chengrui’s insulation paper as “the backbone of our compliance with IEEE standards.” Today, 80% of her suppliers are Chinese, but she emphasizes: “Chengrui isn’t just a vendor—they’re our engineering partner.”

About Chengrui

Since 2010, Chengrui has grown into China's trusted partner for specialized insulation paper. We help global manufacturers solve complex insulation challenges through customized kraft paper solutions (0.25-4.8mm thickness range). Our secret? Full control from raw materials to precision manufacturing ensures every roll meets international safety standards and sustainability requirements.

What clients benefit from us

• R&D-powered customization with fire-resistant options & 12kV/mm dielectric capacity

• Hassle-free Asia deliveries: Shipped quickly to Vietnam and other countries in under 3 weeks.

• Cost predictability with local currency payments

• Greener footprint: 30% lower emissions than regional competitors

From smart grid projects to transformer production lines, we've moved beyond being just suppliers. Last quarter, 80% of clients renewed contracts, citing our compliance expertise and technical support as game changers. Let's discuss how our partnership can strengthen your supply chain now.