Renctly，Zhejiang Chengxin Pharm & Chem Equipment Co., Ltd. underwent its second joint inspection for the renewal of its ASME “U”‑Stamp. The joint inspection team, comprising three experts—Team Leader Shi Kaifeng, Authorised Inspection Organisation (AIS) representative Ju Yuefeng, and Authorised Inspector (AI) Yang Jie—conducted a rigorous two-day review from 6 to 7 August. The jthe joint inspection team unanimously agreed to recommend approval for the “U”‑Stamp renewal audit, confirming that the company’s ASME pressure‑vessel manufacturing system consistently meets international standards.
This assessment presented a unique challenge: 83 spiral‑plate heat exchangers for export to the United States were under fabrication in the workshop. These units were active in‑production items under the company’s existing ASME “U”‑Stamp scope. Spiral‑plate heat exchangers are rarely selected for ASME joint reviews due to their special geometry and complex fabrication processes.
In light of this situation, the joint inspection team decided to focus the audit directly on this batch of spiral plate heat exchangers currently in production. This meant the audit criteria were even more stringent: from design, material traceability, welding processes and non-destructive testing to process records, every stage had to be inspected on the actual production line, leaving very little room for error.
Faced with this highly challenging audit plan, Wang Jianle, the company’s Quality Assurance Engineer, led the system team for rapid preparation. Over the course of nearly two months, the team systematically organised and prepared three major categories of documentation in strict accordance with the joint inspection team’s preliminary requirements:
1.Mock‑up test‑article records: quality documentation covering full simulated manufacturing workflows.
2.In‑production records: complete traceability files tracking all production stages for the 83 spiral‑plate heat exchangers.
3.Historical‑product archives: manufacturing records and operational feedback from previous ASME‑certified deliveries.
Meanwhile, the team carried out extensive on‑site preparations, including designated‑location management for workshop work‑in‑progress, updating and archiving welding procedure specifications, and line‑by‑line verification of non‑destructive‑examination records. These measures ensured efficient document retrieval and well‑organized on‑site demonstrations during the joint review.
During the joint review, the three experts conducted comprehensive, in-depth evaluation of the company’s ASME quality‑assurance system through site walks, document audits, staff interviews and random process sampling. The assessment covered all mandatory elements defined by ASME codes: design control, material management, procedure specifications, welding control, non‑destructive examination, simulated heat treatment, pressure testing and final inspection.
Following two days of intensive work, the joint‑review panel concluded: Zhejiang Chengxin Pharma & Chem Equipment Co., Ltd. maintains an effectively operating ASME quality-assurance system. Fabrication of the spiral-plate heat-exchanger work-in-progress complies with requirements of ASME Boiler and Pressure Vessel Code Section VIII, Division 1. The panel unanimously recommended approval of the “U”-Stamp recertification audit.
The successful recertification is solid proof of sustained effective operation of the company’s ASME‑compliant system. It also demonstrates the company’s technical competence and quality-management capabilities for manufacturing pressure vessels with special structures. The acceptance of these non-standard spiral-plate heat exchangers as core review samples further expands the company’s capacity to secure high-end international equipment orders.
Going forward, Zhejiang Chengxin Pharmal & Chem Equipment Co., Ltd. will uphold its corporate philosophy of “Integrity‑Oriented, Quality‑First”. The company will keep improving its quality‑management system and deliver superior‑quality products and services to honor the trust of global customers.