--- title: "Plastic Tubing Manufacturer: What to Check Before You Source" canonical: "https://yuannaitube.com/plastic-tubing-manufacturer-checklist/" language: "en-US" --- RESOURCES # Plastic Tubing Manufacturer: What to Check Before You Source By [YUANNAI TUBE]() Published 2026-10-28Updated 2026-11-05 ![Close-up of a freshly cut blue tube end with coils of blue, black and white tubing behind it]() ## Plastic tubing manufacturer: the short answer A tubing manufacturer extrudes the tube itself, so it controls the material, the dimensions, the colors and the inspection. A trader or distributor resells tubing made elsewhere. Before you source, ask the supplier seven things: what it extrudes, which sizes and tolerances it holds, how each batch is checked, which documents come with an order, what its **certificates** cover, what it can customize, and what the minimum order and samples are. This page gives you those seven checks and shows what we publish for each. For a wider supplier checklist, see [how to choose a tubing supplier]() . ## Manufacturer or trader: how to tell You can tell from the answers to three plain questions. Does the company run extrusion lines, or does it buy finished tubing? Can it change the **outer diameter**, **inner diameter**, wall, color or length for you, or only sell what is in stock? And who holds the **inspection records**, the supplier or someone behind it? A manufacturer can answer all three from its own production. A trader can still be a good source for stock sizes, but it usually cannot change a tube or show you the process. ## Seven checks before you source from a tubing manufacturer | Check | What to ask | What a clear answer looks like | | --- | --- | --- | | 1. Production | Which extrusion and coiling equipment does it run for my material? | A list of the lines, including any line for high-temperature fluoropolymers if you need FEP or PFA. | | 2. Material | Is the tubing made from virgin material, and what is the exact material designation? | The material named on the data sheet (for example PA6, PA12, polyether polyurethane, FEP, PFA), not a general family name. | | 3. Sizes and tolerance | Which OD and ID sizes are standard, and what tolerance applies? | A model table with OD, ID and a stated tolerance, such as ±0.10 mm on our nylon tubing. | | 4. Inspection | How are dimensions, pressure and strength checked, and are records kept? | Named measuring and test equipment, and the records that come with an order. | | 5. Documents | Which data sheets, test reports and certificates come with the tubing? | A data sheet per product, and reports that state the sample and the scope they apply to. | | 6. Customization | Can it change size, formulation, structure, color, marking and packaging? | A written list of options and the minimum order for a custom specification. | | 7. Terms | What are the minimum order, the lead time and the sample policy? | Figures in writing, with what starts the lead time. See [MOQ, lead time and samples]() . | ## What we publish for each check - **Production:** Hefei Yuannai Pneumatic Equipment Co., Ltd. was founded in Shanghai in 2005 and started with **PU tubing**. Its production base has been in Lujiang, Hefei, Anhui since 2016. The company equipment inventory lists tubing extrusion and coiling lines, including high-temperature fluoropolymer extrusion, single-head and double-head extrusion, and recoil-tubing production lines. See [about us]() . - **Sizes and tolerance:** every product family has a model table with OD, ID and **working pressure**. Our **nylon tubing** lists a tolerance of ±0.10 mm. See the [tubing size chart]() . - **Inspection:** the inventory lists calipers, micrometers and optical measurement, plus pressure-hold, burst-pressure, tensile and motion-test equipment. Product requirements are reviewed against the drawing and the order. - **Documents:** technical data sheets for the main product families are on the [data sheets page]() . Four management-system **certificates** (IATF 16949, ISO 9001, ISO 14001 and ISO 45001) are listed with their original documents on the [certificates page]() . Each document applies only to the scope stated in it; see [how to read certificates and test reports]() . - **Customization:** OD, ID and wall, roll or cut length, **material formulation**, single-layer or multi-layer structure, color, marking and packaging, plus samples, **first article inspection** and tube assemblies with pre-installed fittings. See [OEM and custom tubing]() . ## What inspection looks like from incoming material to shipment A claim that tubing is “inspected” means little until you know where and how. This is how our written procedures describe it. They are internal company documents, and the scope and tests for your order are agreed against your drawing. - **Incoming material (YN-SOP-070-002):** a supplier delivers with a delivery note and a material certificate or test report. The goods wait in a pending-inspection area while the inspector checks the documents, dimensions and appearance. Material that passes is marked with a batch number or material code that is also written on the certificate, so it can be traced. Material from a supplier that is not approved is not inspected until a supervisor decides. - **During production (YN-SOP-070-003):** the operator confirms that the product number and version on the route sheet match the drawing, that the previous step is recorded, and that each gauge carries a valid calibration label. Appearance is checked 100%, results are written on the route sheet, and nonconforming product is held in a marked area. Only staff trained in first-article inspection process and inspect first-article items. - **Finished tubing (YN-SOP-070-004):** appearance limits, measuring instruments and the tests the drawing calls for are listed in [how we inspect finished tubing before it ships]() . When you ask another manufacturer about inspection, ask at which of these three points it checks, and what record each point leaves. ## Frequently asked questions Is a tubing manufacturer cheaper than a distributor? Not always, and price is only one check. A manufacturer can change a tube to your size or color and can show its process, which a distributor usually cannot. For a stock size in a small quantity, a distributor can be quicker. Compare quotations on the same specification, quantity and terms. Can a manufacturer make a size that is not in the catalog? Often yes, subject to technical review. State the OD, ID, wall, material, tolerance and length, and ask for the minimum order for a custom specification. Ours starts at 3,000 m per specification. What documents should I ask a tubing manufacturer for? Ask for the data sheet of the exact product, a test report that names the sample and the scope, and the **certificates** the supplier relies on, with their scope. Treat a certificate as covering only what it states. How can I test a manufacturer before a large order? Order a short sample of the exact size and run the tests that matter for your line. See [how to test tubing samples]() , then [request a sample]() . ## Send your specification Send the material, OD and ID, length or roll size, quantity, **working pressure** and temperature, and any documents you need. [Send your requirements]() , [request a sample]() or [browse the product range]() . **Related guides:** [what affects tubing price]() . ## Sources and scope - [OEM options and order requirements]() - [Published wholesale supply terms]() - [Sample policy and request requirements]() These are published purchasing policies and information requirements. Price, quantity, delivery, sample charges and custom work are confirmed in the written quotation for the requested specification. Content review: [zhangkexin]() · Marketing Review scope: market information and document references. ## Tell us what your application needs. Send your dimensions, operating conditions and quantity. Let’s identify the right tubing for your project. [Request a Quote →]() ## Related tubing products ![PFA Tubing]() [PFA]() ### PFA Tubing PFA fluoropolymer tubing for strong acid, alkali, oxidizing-agent and solvent lines. 14 models from 2.5 x 4 mm to 12 x 16 mm and 1/8″ to 1/2″, in 100 m rolls. 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