Views: 209 Author: Sunmoon Publish Time: 2026-07-03 Origin: Site
Content Menu
● Why Source 4 Layflat Hose from China
● How We Evaluate Layflat Hose Manufacturers
>> Experience: Factory, QC and Delivery Stability
>> Expertise: Materials, Standards and Compliance
>> Authoritativeness: China's Industrial Cluster Advantage
>> Trust: Transparency, Markets and OEM/ODM Competence
● Selection Criteria: How This Top 10 List Was Built
● Top 10 4 Layflat Hose Manufacturers in China
>> 1. Jiangsu Sunmoon Shale Gas High-Pressure Hose Co., Ltd.
>> 2. Hangzhou Haikuo Rubber and Plastic Products Co., Ltd.
>> 3. Shandong Jinyu Rubber Group Co., Ltd.
>> 4. Jiangsu Tongyi Hose Co., Ltd.
>> 5. Hebei Xinlong Plastic Co., Ltd.
>> 6. Zhejiang Xingye Rubber Products Co., Ltd.
>> 7. Guangdong Jiahong Plastic Products Co., Ltd.
>> 8. Shaanxi Hongda Rubber Co., Ltd.
>> 9. Fujian Longxiang Rubber Products Co., Ltd.
>> 10. Tianjin Hongda Plastic Co., Ltd.
● Key Comparison: Capacity, MOQ and Certifications
● Buyer's Guide: Practical Steps for Global Procurement Managers
>> Verifying Factory Identity and Certifications
>> Sampling, Technical Alignment and Pilot Orders
>> Logistics and Packaging Considerations
● Industry Data: Market Outlook and Sourcing Implications
● Hidden "Internal" Pitfalls in Layflat Hose Sourcing (Rarely Discussed Publicly)
● Turning Data into a Long-Term Partnership Strategy
● FAQ: Advanced Questions Real Procurement Managers Ask
China currently concentrates a large share of global layflat hose capacity, covering applications from shale gas and frac-water transfer to agriculture, dewatering and construction. Mature clusters in provinces such as Jiangsu, Hebei, Zhejiang and Guangdong combine raw-material supply, extrusion lines, textile reinforcement and coupling machining within short radii, which reduces lead time and total landed cost for international buyers. [b2bdata.baidu]
For 4" layflat hoses—especially NBR, TPU and PVC constructions—Chinese manufacturers today can offer multiple pressure classes, engineering-grade customization and OEM branding support, while still maintaining cost advantages versus European and North American producers. When properly qualified, these suppliers are suitable for long-term, program-based procurement rather than one-off spot orders. [sinospect]
When selecting 4 layflat hose partners, experienced procurement teams typically screen factories on four operational dimensions: [sinospect]
- Factory certification: ISO 9001, ISO 14001, and for specific projects CE/EN and RoHS where relevant, all verified against registrar or accreditation-body databases. [sourcingwill]
- R&D capability: evidence of new-diameter development, higher-pressure designs, and application-specific hoses rather than purely catalog reselling. [linkedin]
- QC workflow: documented hydrostatic testing, batch-traceability and inspection records; for layflat hoses, this includes burst-test data and pressure-hold cycles. [hosemanufacture]
- Delivery stability: capacity versus committed order book, typical lead times, and on-time shipment performance to main export markets. [b2bdata.baidu]
For 4 layflat hoses, buyers should pay attention to material grades and process standards, as these directly impact life-cycle cost and safety: [linkedin]
- NBR layflat hose: suitable for oil-contaminated water and fuels; buyers should ask for compound formulation data, oil-resistance ratings and temperature-range validation. [linkedin]
- TPU layflat hose: widely used in shale gas, frac-water and high-pressure transfer; higher abrasion resistance and flexibility, often with textile or aramid reinforcement. [hosemanufacture]
- PVC layflat hose: cost-effective for agriculture, dewatering and construction; focus on UV stability, cold-flex performance and resistance to fertilizers or mild chemicals. [linkedin]
- Compliance: CE marking for relevant applications, RoHS for electrical-related environments, and conformity to EN or ISO hose standards where specified; certificates must be authenticated through notified-body lists and registrars. [sites.google]
China's hose industry benefits from vertically integrated clusters similar to Foshan's role in furniture or Shenzhen in electronics. In Jiangsu and Zhejiang, layflat hose factories are supported by local polymer suppliers, textile reinforcement weavers and machining shops for couplings, which facilitates engineering customization without excessive cost or delay. Hebei and Shandong clusters, meanwhile, specialize in PVC and heavy-duty rubber hoses for mining, construction and municipal water networks. [b2bdata.baidu]
Trust for B2B hose sourcing is built through documentation and behavior rather than claims: [sinospect]
- Transparency: willingness to share business license, certification copies, test reports and reference-project information. [sinospect]
- Export markets: sustained shipments to North America, Europe, the Middle East, Australia or Latin America, with references that can be contacted directly. [linkedin]
- OEM/ODM services: ability to provide private labeling, color and packaging customization, and co-engineering of hose and coupling systems. [hosemanufacture]
- After-sales: responsiveness on technical queries, failure investigation and replacement policies, which strongly affect lifecycle risk in remote projects. [linkedin]
To assemble this 2026 list of representative 4 layflat hose manufacturers in China, we combined publicly available data, industry reports and observable export activity. The focus is on factories with proven manufacturing capability for NBR, TPU or PVC layflat hoses in 4 nominal diameter, not trading companies or generic plastic suppliers. [b2bdata.baidu]
Key filters used: [hosemanufacture]
- Product scope: demonstrated layflat hose production with 4 options, covering at least one of NBR, TPU or PVC.
- Capacity and stability: evidence of scalable output, automated lines and multi-year operation without major compliance incidents. [hosemanufacture]
- Certifications: ISO 9001 or similar quality-management systems, plus CE/RoHS or sector-specific approvals where applicable. [sourcingwill]
- Export presence: visible export record or participation in B2B platforms and international projects. [b2bdata.baidu]
- Customization capability: OEM pressure classes, length, coupling systems and branding services. [hosemanufacture]
This is an expert selection guide rather than an exhaustive ranking; the order reflects typical buyer use-cases and a mix of engineering depth, value and specialization. [linkedin]
Jiangsu Sunmoon Shale Gas High-Pressure Hose Co., Ltd. (Sunmoon) is an engineering-driven manufacturer founded in 2011, based in Jiangsu Province with a 35,000 m² site and eight automated production lines. The company specializes in TPU layflat hoses and high-pressure transfer solutions, with annual TPU layflat hose output exceeding 1 million meters since 2016 and continuous development into 14–20\" large-diameter hoses. [hosemanufacture]
For buyers focused on 4 layflat hoses, Sunmoon is best positioned as a high-value, R&D-centric partner for OEM projects rather than a mass-market commodity supplier. Sunmoon offers multiple working-pressure options for the same diameter, engineering-level customization (diameter, pressure class, materials, structure, length, couplings, hose reel solutions) and aramid-reinforced constructions for demanding duty cycles. Every hose is hydrostatically tested on a 260 m pressure-test line, with traceable records, which is attractive for mid-sized brands and EPC contractors seeking European-grade quality at Chinese cost levels. [hosemanufacture]
- Core strengths: engineering-grade TPU and aramid-reinforced layflat hoses, full customization and traceable QC. [hosemanufacture]
- Founding year: 2011. [hosemanufacture]
- Main markets: oil & gas, agriculture, dewatering, emergency rescue, construction and underground water extraction for both domestic and international clients. [hosemanufacture]
- OEM/ODM focus: flexible on pressure and configuration, strong support for branding, packaging and project-specific hose–coupling systems. [hosemanufacture]
Hangzhou Haikuo Rubber and Plastic Products Co., Ltd. is a long-established producer of layflat hoses with a broad product range covering agriculture and industrial transfer applications. The factory utilizes advanced extrusion and weaving technology, focusing on uniform wall thickness and reinforcement for pressure stability in PVC and rubber-based hoses. [linkedin]
Haikuo's portfolio includes 4 layflat hoses designed for irrigation and chemical transfer, with customization options in size, color and performance characteristics. Multiple international quality certifications support its credibility, and the company maintains a proactive R&D capability for new hose types. [linkedin]
- Core strengths: wide layflat product range, strong material selection and proven export record. [linkedin]
- Main markets: agriculture, factory utilities and general industry with global reach. [linkedin]
- OEM/ODM focus: customized color, wall thickness and performance tuning. [linkedin]
Shandong Jinyu Rubber Group Co., Ltd. operates as a large-scale rubber enterprise with heavy emphasis on high-pressure layflat hoses for mining and construction. Its 4 hoses are typically positioned for high-pressure water and slurry transfer, using special rubber compounds and reinforcement structures for extreme pressure resistance and abrasion performance. [linkedin]
The company runs strict quality control from raw material selection to final inspection, and its heavy-duty hoses often incorporate anti-abrasion outer layers and wide temperature-resistance ranges. This makes it relevant for buyers who require robust 4 hoses in challenging industrial environments. [linkedin]
- Core strengths: heavy-duty high-pressure layflat hoses, large-diameter capability and industrial robustness. [linkedin]
- Main markets: mining, construction and heavy industry. [linkedin]
- OEM/ODM focus: tailored pressure ratings, abrasion layers and project-specific specifications. [linkedin]
Jiangsu Tongyi Hose Co., Ltd. focuses on lightweight and flexible layflat hoses, primarily targeted at agriculture and gardening. Its modern automated production line produces 4 hoses with low weight and high flexibility, designed for frequent movement and coiling in field operations. [linkedin]
The factory emphasizes environmental considerations, using non-toxic materials for its hoses and optimizing production for cost-effective output. For buyers seeking economical 4 layflat hoses for irrigation, Tongyi can be a suitable option. [linkedin]
- Core strengths: lightweight, flexible and cost-effective layflat hoses. [linkedin]
- Main markets: agriculture, gardening and small-scale water transfer. [linkedin]
- OEM/ODM focus: branding, color and performance tuning within economical budgets. [linkedin]
Hebei Xinlong Plastic Co., Ltd. is well known in the PVC products segment, with a strong focus on PVC layflat hoses. Its 4 PVC layflat hoses offer cost-effective chemical resistance, smooth inner surfaces for high flow, and multiple color options for identification in complex sites. [linkedin]
The company's competitive pricing and large product portfolio make it a frequent choice for budget-conscious buyers who still require predictable performance and basic quality assurance. [linkedin]
- Core strengths: PVC layflat hoses, cost leadership and high-volume production. [linkedin]
- Main markets: irrigation, fertilizer transfer and general utility water. [linkedin]
- OEM/ODM focus: color coding, branding and size customization. [linkedin]
Zhejiang Xingye Rubber Products Co., Ltd. specializes in firefighting hoses and rubber-based layflat products designed for high safety requirements. Its 4 hoses incorporate fire-retardant rubber formulations, high-speed water-delivery designs and flexibility under stress for firefighting operations. [linkedin]
The company's products carry relevant certifications for firefighting use and benefit from a dedicated R&D team focused on emergency-service requirements. [linkedin]
- Core strengths: firefighting layflat hoses with fire resistance and high flow rates. [linkedin]
- Main markets: firefighting, municipal emergency services and industrial fire protection. [linkedin]
- OEM/ODM focus: hose performance tailored to national firefighting standards and branding for equipment manufacturers. [linkedin]
Guangdong Jiahong Plastic Products Co., Ltd. is known for multi-layer layflat hoses produced with co-extrusion technology. Its multi-layer 4 hoses combine abrasion-resistant outer layers with chemically resistant inner layers, increasing pressure capability and service life. [linkedin]
For buyers who require balanced strength, durability and chemical resistance without moving into premium TPU pricing, Jiahong's multi-layer PVC or composite hoses can be a practical solution. [linkedin]
- Core strengths: multi-layer layflat hose design, co-extrusion technology and high pressure resistance. [linkedin]
- Main markets: industrial chemical transfer, agriculture and construction. [linkedin]
- OEM/ODM focus: layer configuration, pressure class, and color/branding customization. [linkedin]
Shaanxi Hongda Rubber Co., Ltd. focuses on heavy-duty layflat hoses for oil and gas transportation. Its 4 hoses utilize thick-walled rubber and high-strength reinforcement to withstand high-pressure and high-temperature conditions, often in large-scale pipeline projects. [linkedin]
The company can supply large-diameter hoses and offers corrosion-resistant formulations compatible with hydrocarbons and industrial chemicals. [linkedin]
- Core strengths: heavy-duty layflat hoses for oil and gas, corrosion resistance and large-diameter options. [linkedin]
- Main markets: oil & gas pipelines and large industrial projects. [linkedin]
- OEM/ODM focus: project-specific rubber compounds, diameters and reinforcement designs. [linkedin]
Fujian Longxiang Rubber Products Co., Ltd. emphasizes environmentally friendly layflat hoses, particularly for the food and beverage sector. Its hoses use food-grade rubber, smooth inner surfaces and easy-to-clean designs to meet hygiene requirements. [linkedin]
For buyers needing 4 hoses in process environments where product purity and sustainability matter, Longxiang's offerings are relevant. [linkedin]
- Core strengths: food-grade layflat hoses, hygiene and environmental considerations. [linkedin]
- Main markets: food and beverage processing, clean-water applications. [linkedin]
- OEM/ODM focus: compliance to food-contact standards, color and labeling customization. [linkedin]
Tianjin Hongda Plastic Co., Ltd. produces plastic layflat hoses for urban water supply, sewage drainage and irrigation in green spaces. Its 4 hoses are designed for versatile applications, offering UV resistance and easy installation due to low weight. [linkedin]
The company balances cost-effectiveness with adequate performance, serving municipal and infrastructure markets in northern China and abroad. [linkedin]
- Core strengths: versatile plastic layflat hoses, UV resistance and easy installation. [linkedin]
- Main markets: urban water, drainage and irrigation projects. [linkedin]
- OEM/ODM focus: application-specific hose design and branding for local utilities. [linkedin]
The table below summarizes indicative positioning for global buyers planning 4 layflat hose sourcing. Values are generalized based on publicly available information and typical industry practice rather than exact confidential figures. [b2bdata.baidu]
Manufacturer | Relative Capacity | Typical MOQ for 4" layflat | Core Certifications / Claims |
Sunmoon (Jiangsu) | Medium–High (8 automated lines, 1M+ m/yr TPU) (hosemanufacture) | Flexible, project-based; suitable for mid-sized OEM orders (hosemanufacture) | ISO-style quality system, hydrostatic test per hose, engineering QC records (plus project-level certs upon request) (hosemanufacture) |
Hangzhou Haikuo | High, broad layflat portfolio for ag/industry (linkedin) | Container-level orders common; small trial batches possible via distributors (linkedin) | Multiple international quality certifications for layflat hoses; export-compliant documentation. (linkedin) |
Shandong Jinyu | High, group-level rubber capacity for heavy-duty hoses (linkedin) | Higher MOQs aligned with mining/construction projects (linkedin) | ISO-type systems, application-specific test reports for high pressure and abrasion. (linkedin) |
Jiangsu Tongyi | Medium, automated lines for lightweight hoses (linkedin) | Lower MOQ options for ag and gardening suppliers (linkedin) | Focus on environmental-friendly materials, basic quality management and product conformity. (linkedin) |
Hebei Xinlong | High, PVC-focused mass production (linkedin) | Larger MOQs to support price competitiveness (linkedin) | PVC product compliance, internal QC; buyers should verify ISO and CE claims case by case. (linkedin) |
Zhejiang Xingye | Medium, firefighting specialization (linkedin) | Project-linked MOQ based on firefighting standards (linkedin) | Firefighting hose certifications and safety approvals; ISO-type systems. (linkedin) |
Guangdong Jiahong | Medium–High, advanced co-extrusion for multi-layer hoses (linkedin) | Moderate MOQ; tailored to multi-layer designs (linkedin) | Process and product certifications for multi-layer structures; lab test reports. (linkedin) |
Shaanxi Hongda | High, heavy-duty oil & gas hose capacity (linkedin) | Project-scale MOQ typical for pipelines (linkedin) | Industrial certifications and test data for high-pressure, corrosive media. (linkedin) |
Fujian Longxiang | Medium, food-grade hose specialization (linkedin) | Moderate MOQ aligned with food/beverage plants (linkedin) | Compliance with food-contact and hygiene standards; ISO-type systems. (linkedin) |
Tianjin Hongda | High, municipal plastic hose capacity (linkedin) | Infrastructure-scale MOQ but flexible for phased projects (linkedin) | UV resistance and performance documentation; local-regulation conformity. (linkedin) |
Before placing 4 layflat hose orders, experienced buyers start with legal and certification verification rather than catalog reviews: [sites.google]
1. Confirm legal entity
- Request a clear business license scan in Chinese, including Unified Social Credit Code and business scope. [sinospect]
- Cross-check the entity in China's National Enterprise Credit Information Publicity System (gsxt.gov.cn) or tools like Qichacha/Tianyancha. [sinospect]
2. Authenticate ISO 9001 and related certificates
- Ask for full ISO certificates and verify them via the issuing body's public registry or IAF/ANAB/CNAS accreditation databases. [seller.alibaba]
- Check certificate number, legal entity name, site address, scope description and expiry date. [sourcingwill]
3. Validate CE and RoHS compliance
- Review the EU Declaration of Conformity for CE-marked hoses; verify notified-body numbers in the NANDO database where applicable. [sourcingwill]
- For RoHS, request lab test reports (SGS, Intertek, BV) showing substance-level analysis for restricted materials, dated within the last year. [sites.google]
A disciplined sampling process reduces downstream risk: [sites.google]
- Technical drawings and datasheets: align on wall thickness, reinforcement type, working and burst pressure, temperature range and chemical compatibility before sample production. [linkedin]
- Physical samples: test at your own facilities or through a third-party lab, focusing on burst pressure, cyclic loading, kink resistance, coupling retention and abrasion performance. [sourcingwill]
- Pilot batches: start with a limited 4 batch deployed in a controlled segment of your project, monitoring failure rates and handling feedback from operators. [sinospect]
For 4 layflat hoses, logistics and packaging directly influence project efficiency and damage risk: [hosemanufacture]
- Coil length and reel solutions: coordinate with suppliers like Sunmoon that can match hose lengths to reel systems, minimizing on-site cutting and connection points. [hosemanufacture]
- Palletization and container loading: ensure hoses are packed to avoid deformation, with moisture protection where transit climates are humid. [linkedin]
- Documentation: secure packing lists, test records per batch and HS-code alignment for smoother customs clearance, especially when RoHS/CE documents are attached. [sites.google]
Recent industry data and market reports indicate that demand for layflat hoses, particularly TPU and high-pressure variants, continues to grow in oil & gas, agriculture and dewatering applications. B2B platforms and data providers show dozens of Chinese TPU layflat hose manufacturers, with 2025–2026 export growth driven by frac-water projects and large-scale irrigation. [made-in-china]
Statista and sector associations report that industrial hose markets are expanding with infrastructure investment and environmental management projects; although figures vary by segment, this trend suggests stable or rising demand for 4 layflat hoses in multi-region deployments. For buyers, this translates into better supplier choice but also the need for stronger qualification processes to differentiate engineering-grade producers from generic resellers. [b2bdata.baidu]
Industry insiders consistently note several recurring risks that are underrepresented in public marketing materials: [sourcingwill]
- Off-spec compound substitution: some factories may quietly downgrade polymer or reinforcement grades between sample and mass production to protect margins, especially on low-price tenders; this often shows up only in long-term field failures rather than initial tests. [sinospect]
- Certificate "shadow factories": a group may obtain ISO/CE certifications for one site but produce export orders at another, less controlled site, using the same certificate number; buyers can detect this by comparing certificate site addresses with inspection or video-walk locations. [sinospect]
- Batch inconsistency: hoses from different batches may have variable wall thickness or reinforcement density if process control is weak; this can be mitigated by requiring per-batch test reports and random third-party inspections. [sourcingwill]
- Coupling mismatch: hoses may be supplied with generic couplings not fully matched to hose mechanical properties, leading to slippage or failure at pressure; co-engineering hose–coupling systems with factories that have engineering-level customization (like Sunmoon) reduces this risk. [sourcingwill]
Experienced buyers often insist on live video factory tours or on-site audits for higher-value or long-term projects to validate that production reality matches documentation. [sinospect]
China's 4 layflat hose manufacturers now cover the full spectrum from engineering-grade TPU solutions, as seen with Sunmoon, to high-volume PVC producers and specialized rubber hose factories for firefighting and oil & gas. By combining structured supplier qualification, rigorous certificate verification and realistic field trials, global procurement managers can transform a fragmented supplier landscape into a resilient, multi-supplier strategy with balanced cost, quality and risk. [sites.google]
For mid-sized brands, OEMs and EPC contractors seeking flexible engineering support and high value without overpaying for brand premiums, engaging with engineering-driven factories such as Jiangsu Sunmoon Shale Gas High-Pressure Hose Co., Ltd. can be an effective starting point. Aligning on technical specifications, QC reporting and long-term delivery plans early in the process helps both sides build a predictable, scalable collaboration around 4 layflat hose projects. [sinospect]
If you plan to target a specific end-use—such as shale gas, agriculture, firefighting or municipal water—sharing your primary application upfront will significantly refine which of these manufacturers should sit at the core of your supplier panel.
1. How can I check if a factory's ISO 9001 certificate is authentic and not expired?
You should request a full ISO 9001 certificate with visible certificate number, legal entity and site address, then verify it in the certification body's online database and cross-check accreditation via IAF, CNAS or ANAB. Confirm the expiry date and surveillance-audit status; any mismatch between factory name or address and certificate details is a red flag. [seller.alibaba]
2. How do I ensure that my 4 layflat hose order is produced at the certified site, not a secondary facility?
Compare the address on the ISO/CE certificates with the production location shown in factory videos, audit reports or on-site visits, and specify the certified site explicitly in contracts and POs. You can also include clauses allowing random third-party inspections and batch documentation tied to that specific site. [sinospect]
3. What is the best way to verify CE and RoHS compliance for hoses used in regulated markets?
For CE, review the Declaration of Conformity and check notified-body numbers in the EU's NANDO database; for RoHS, require recent lab test reports from recognized labs (SGS, Intertek, BV) covering restricted substances for the actual hose compounds. Ensure that part numbers and batch identifiers on reports match the products being shipped. [sites.google]
4. How can I compare total cost of ownership between TPU, NBR and PVC layflat hoses?
Total cost of ownership depends on acquisition cost, service life, downtime risk and application compatibility. TPU typically offers higher abrasion resistance and flexibility, extending life in drag and frac-water usage; NBR performs better with oil-contaminated media; PVC is cheapest but less durable in high-abrasion or extreme-temperature conditions. Running pilot deployments in representative conditions and tracking failure rates over time is the most reliable way to quantify this for your application. [sinospect]
5. What sampling and testing protocol is recommended before signing a long-term frame agreement?
Most procurement teams follow a staged protocol: paper review (datasheets and certificates), lab testing of 4 samples for burst pressure and cyclic performance, field trials in a limited site segment, and at least one factory audit or live video tour. For high-value or critical projects, adding independent third-party inspections and annual certification re-verification is advisable. [sourcingwill]
1. Jiangsu Sunmoon Shale Gas High-Pressure Hose Co., Ltd. Who We Are? Company profile and product overview. Retrieved from: https://www.sunmoonhose.com/aboutus.html
2. Hose Manufacture Blog. Top 10 Layflat Hose Factory in China 2025. Industry overview and representative manufacturers. Retrieved from: https://www.hosemanufacture.com/blog/top-10-layflat-hose-factory-in-china-1744771.html
3. Made-in-China.com. TPU Layflat Hose Manufacturers & Suppliers. Market landscape and supplier listings. Retrieved from: https://www.made-in-china.com/manufacturers/tpu-layflat-hose.html
4. Baidu B2B Data. 2026 Top 10 Hose Manufacturers in China. Industrial ranking and export activity data. Retrieved from: https://b2bdata.baidu.com/en/rank/k/all-area/hose
5. Sinospect. How do you verify a Chinese industrial equipment supplier? Certification and factory verification guidance. Retrieved from: https://sinospect.com/resources/china-supplier-qualification/verify-chinese-supplier
6. SourcingWill. How to Verify Factory Certifications in China (ISO, CE, etc.). Practical instructions on verifying ISO and CE certificates. Retrieved from: https://www.sourcingwill.com/how-to-verify-factory-certifications-in-china-iso-ce-etc/
7. Alibaba.com Seller Blog. ISO 9001 Certified Suppliers from China: Complete Verification Guide. ISO 9001 verification framework for global buyers. Retrieved from: https://seller.alibaba.com/blogs/2026/southeast-asia/food-beverage/iso-9001-verification-guide-alibaba-b2b
8. Google Sites. How U.S. buyers can verify ISO or RoHS certifications from Chinese supplier. RoHS and ISO verification practices. Retrieved from: https://sites.google.com/view/myt-blogs/home/how-u-s-buyers-can-verify-iso-or-rohs-certifications-from-chinese-supplier
