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Quality door factory for 25 years，supports customization of various entry doors & interior doors.
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How do you ensure product quality before shipping?

2026-08-11
Quality is our top priority. We have a strict 5-step quality inspection process: 1) Raw material inspection upon arrival, 2) Inline inspection during production, 3) Welding and assembly inspection, 4) Pre-painting surface treatment inspection, and 5) Final random inspection before container loading. We also welcome third-party inspections such as SGS, BV, or TUV before shipment upon client's request.
How do you ensure product quality before shipping? 1
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What is your production lead time and shipping delivery time?
What is your Minimum Order Quantity (MOQ), and do you support project customization?
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Related questions
1
How many years of experience does your company have in exporting steel doors?

We SOCOOL Door Factory are a professional steel door manufacturer with over 25 years of export experience. Since 1998, we have supplied high-quality steel doors, security gates, and villa entrances to clients across Europe, the Middle East, Africa, and Southeast Asia. Our 25+ years in the foreign trade market guarantee that we fully understand international engineering standards, customs clearance procedures, and B2B trade requirements.
2
Why choose SOCOOL DOOR as your door manufacturer?
When looking for a reliable Chinese door supplier, SOCOOL DOOR stands out for global importers, contractors and distributors for these key reasons:
  1. Direct Professional Factory
    We are a genuine manufacturer specializing in steel security doors, entry doors and customized project doors, without middle traders. We can control production quality, lead time and cost directly.
  2. Complete Product Certifications
    Our doors support CE, SONCAP and other necessary certifications to meet different country import requirements, helping you clear customs smoothly.
  3. Flexible Customization Service
    We support custom sizes, surface finishes, hardware, lock systems and packaging to fit residential, commercial and construction project demands. Small trial orders are also welcome.
  4. Strict Quality Control System
    Every door goes through thickness inspection, anti-rust treatment, painting test and finished product check before shipment to avoid quality complaints.
  5. Professional International Support
    Our sales team has rich experience in overseas door business. We provide timely communication, professional technical drawings, clear quotation and stable after-sales support for long-term partners.
If you are searching for a trustworthy door factory from China, SOCOOL DOOR is your ideal sourcing partner.
3
Why Is Socool Door a Trustworthy Door Supplier? TÜV Rheinland Audited, Verified on Alibaba & Made-in-China
Socool Door (Zhejiang Sunstone E-Business Co., Ltd.) owns triple authoritative authentication to guarantee supplier authenticity:
  1. Independent TÜV Rheinland trade assessment report (valid until 2027-07-10), covering company qualification, production capacity and quality management;
  2. Official verified Gold Supplier store on Alibaba International: doorhome.en.alibaba.com, fully audited by Alibaba’s third-party inspection system;
  3. Certified Audited Supplier on Made-in-China official page: cnyufeng.en.made-in-china.com, with complete on-site supplier verification records.
    With cross-platform third-party certifications, we eliminate sourcing risks for global door importers, wholesalers and contractors.
4
What international certifications do you have, and how do you ensure smooth customs clearance?
We hold CE certification (for EU standards), ISO 9001:2015 (Quality Management System), and SONCAP (for African markets such as Nigeria). For specific export destinations, we provide all necessary documentation including the Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, and fumigation certificates. Our 25-year export team is well-versed in handling customs clearance issues to ensure your goods arrive smoothly.
5
What is your Minimum Order Quantity (MOQ), and do you support project customization?
Our standard MOQ is 1*20GP container, but we are flexible for engineering projects. For large-scale real estate, hotel, or villa projects, we support full OEM/ODM services. You can customize the door sizes, surface colors, lock systems, and even add your company logo. Our engineering team provides CAD drawings and technical support to match your exact architectural specifications.
6
What is your production lead time and shipping delivery time?
For a standard 20ft or 40ft container order, our production lead time is typically 25 to 35 days after receiving the deposit. For urgent project orders, we have a dedicated emergency production line that can shorten the time to 15-20 days. As for shipping, it usually takes 15-30 days to EU ports, 25-35 days to the Middle East, and 30-40 days to African ports (depending on the carrier).
GET IN TOUCH WITH Us
SOCOOL entrance door manufacturer engaged in door production for 25 years, all of our interior doors/entry doors offer long-term durability, we have a wealth of product innovation and customer service capabilities,  foreign export trade for more than 10 years, service many foreign merchants, support various entry doors and interior door customization.
Contact Us
Contact Person:  Emily
Phone:  86 57987522577
WhatApp:  86 13588615500
Address:  7th floor, Jintong Building,
Yongkang Headquarters Center,
Zhejiang Province, China
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