WENZHOU MUCHU TECHNOLOGY CO.,LTD. — operating under the M&C Composite Covers brand — has manufactured SMC and FRP composite manhole covers for over 30 years. We are not a trading company. We compound our own SMC material, run our own heavy-duty presses, and hold EN124, AS3996 and AASHTO certifications. Our covers are installed at PetroChina and Sinopec fuel stations, on highways, and in municipal infrastructure across six continents.
Most suppliers quoting you on composite manhole covers are traders. We manufacture — from raw SMC material through to the finished, certified cover.
We produce our own SMC sheet material using imported eco-friendly raw materials, press it on our own 2000-ton, 1500-ton and 1000-ton machines, and apply full quality inspection before shipment. No subcontractors, no outsourced pressing.
Our products carry EN124 (Europe & international), AS3996 (Australia & New Zealand), and AASHTO (North America) certification. Third-party test reports from SGS and national laboratories are available on request.
Our original market was petroleum retail. We have been an approved supplier to PetroChina and Sinopec — China's two largest state oil companies — for many years, supplying D400 composite covers to thousands of fuel stations across China and internationally.
Most composite cover suppliers in China are trading companies reselling third-party products. Here is what makes us different.
We produce our own SMC sheet material in-house using imported eco-friendly raw materials. This gives us full control over formula, quality consistency, and competitive pricing — unlike suppliers who buy SMC from third parties.
We have been an approved composite cover supplier for PetroChina and Sinopec for many years. This is a verifiable procurement qualification — not marketing language — and demonstrates our ability to meet the strictest quality and delivery requirements.
We operate a 2000-ton press, a 1500-ton press, two 1000-ton presses, and a full range of smaller tonnage presses — enabling us to manufacture large-format and high-load SMC covers with precision and consistency at volume.
Custom logos, RAL colours, non-standard dimensions, special opening configurations, and project-specific load ratings — all produced from our own tooling. Our engineering team handles design-to-production for OEM requirements from oil companies and EPC contractors.
We maintain long-standing partnerships with clients of over 10 years, and our skilled workforce includes seasoned operators with 30+ years of hands-on experience in SMC composite manufacturing. Reliability is built into how we operate.
EN124 for Europe, AS3996 for Australia, AASHTO for North America — one supplier, global compliance. We also hold ISO 9001, ISO 45001, and ISO 14001, with SGS third-party test documentation available for qualified buyers.
Tell us your cover specification, load class, quantity, and delivery country. We respond within 24 hours with pricing, lead time, and available certifications.