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Contact — Send a Drawing, Get a Workability Answer

Four ways to reach the workshop: WhatsApp, email, the landline and the form below. Whichever you use, the first reply answers one question — can this part be bent within Ø4–150 mm, in this material and wall, at this radius — and says what tooling it needs. A price follows the drawing, not the message.

Four ways in, and which one to useThey all reach the same workshop. Pick by what you are sending, not by preference.

WhatsApp	+86 139 2244 4186 — the fastest route, and the only one that works well for photographs taken on a phone. Use it when the part is in front of you and you want to know whether it can be copied.
Email	hi@newsiyuantube.com — for files. PDF, DWG, DXF and STEP all open here. If a drawing set is larger than a few megabytes, send the part drawing and the tube table first; the rest can follow.
Landline	+86 20 8464 9704 — 08:00–18:00 China time, Monday to Saturday. English or Chinese. Useful for a question that is easier to ask than to type, such as whether a specific die exists.
Enquiry form	Below. Four fields. Use it if you would rather not open a mail client, or if you want the enquiry logged with a reference.

The mobile number +86 191 2920 6253 reaches the same team and is the number to use if the landline is not answered during a holiday period.

What the first reply coversAnd what it deliberately does not.

A bent tube part can fail a quotation for four reasons that have nothing to do with price: the diameter is outside Ø4–150 mm, the wall is outside 0.8–5 mm, the radius needs a die we do not hold, or the part needs a certificate this factory does not carry. All four are checked before anything else, because finding out at the container is too late for both sides.

Workable or not — the tube size, wall and radius against the dies that exist here. If a new die is needed, the reply says so and gives the added time before the first part is bent.
Process route — bend only, bend plus weld, or cutting on the laser and bending after. Cutting goes to Ø220 mm; bending stops at Ø150 mm, so a Ø180 mm tube can be cut here and cannot be bent here.
Documents — what can be issued and what cannot. Material certificates to EN 10204 3.1 can be requested and are issued by the steel mill. Salt spray testing is available on request against an agreed standard and laboratory. Class society approval, IATF 16949, PPAP and EN 1090 are not held here, and no reply will suggest otherwise.
What comes second — the price. The engineering team reads the drawing for what is missing and for whether a die, a fixture or extra inspection adds cost; the owner then reviews the figure before it is released. That review is why it is a second message rather than a line in the first.

A drawing and a quantity are enough to start. A part number alone is not, unless the drawing for that number is attached.

If you have no drawingFive pieces of information carry a first answer.

Photograph	The whole part against a plain background, plus one close-up of a bend. A rule or a tape in the frame helps more than a written dimension.
Tube	Outside diameter, wall thickness, and whether the section is round, square or oval.
Bend	How many bends, roughly what angle, and the centreline radius if it is known. If it is not known, the photograph is enough to start.
Material	Carbon steel, 304, 316L, aluminium, copper. If it is a stainless part that has been outside, say so — 304 and 316L behave differently in salt and that changes the recommendation.
Quantity	One piece for a sample, or a batch. Both are accepted; a single piece is the normal way a new part starts here.

Part numbers and drawings of current customers are never published on this site. If your part is under NDA, that is the normal case here, not an exception.

What we will say no toBetter said before the order than after it.

Safety-critical vehicle parts — brake lines, steering components, suspension load paths. A bent tube in these positions needs a process audit and a liability chain that this workshop does not carry.
Pressure-retaining parts — no pressure vessel or pressurised line work, and no test certificate for pressure integrity.
Certificates we do not hold — Class society approval for marine, IATF 16949 and PPAP for automotive, EN 1090 for structural. Each of these is named on the certificates page with what is and is not held.
Bending above Ø150 mm — laser cutting reaches Ø220 mm, bending does not. A Ø180 mm part can be cut here and bent elsewhere.
Finished systems — no assembled handrail installed on site, no finished machine. The output is the bent and welded part, not the product it goes into.

Send a drawingFour fields. If you have the part number and the quantity, that is already enough to start.

WhatsApp — customer service line: +86 139 2244 4186
Email: hi@newsiyuantube.com
Factory landline: +86 20 8464 9704
Mobile: +86 191 2920 6253
Factory: 广州市番禺区大龙街傍江西村将军子路7号
No. 7, Jiangjunzi Road, Bangjiangxi Village, Dalong Street, Panyu District, Guangzhou, Guangdong, China (Chinese address controls). Open in Google Maps · Company and workshop.
Hours: 08:00 – 18:00 China time, Monday to Saturday

The WhatsApp number is a customer-service line. The mobile number reaches Yang Mingyuan, the export contact who signs the replies from this site. Neither number quotes prices: the price is checked by the engineering team and reviewed by the owner before it is released.

A drawing and a quantity get a feasibility answer first and a price second. If the part sits outside Ø4–150 mm, you hear that in the first reply.

Contact questionsThe five that come up before an enquiry is sent.

How soon is the first reply?

Enquiries are read during workshop hours, 08:00 to 18:00 China time, Monday to Saturday. A drawing sent on a working day is normally answered the next working day. Anything sent on a Sunday or a public holiday is read on the next working day. The reply is a feasibility answer; the price is a separate message and follows the drawing.

Do I have to send a drawing to get an answer?

No. A photograph of the part with tube outside diameter, wall thickness, centreline radius and quantity is enough for a first answer. A drawing is needed before a price, because the price follows the number of bends, the die and the weld work.

Can you sign an NDA before I send drawings?

Yes. Send the NDA with the first message and it is signed before any file is opened. Several parts in production here are made under NDA. Those parts are described on this site by process and material only — no customer names, no drawings, no photographs of the finished assembly.

Can I visit the workshop?

Yes, by arrangement on a working day. The workshop is in Panyu District, Guangzhou. Tell us the date and the parts you want to see, and we will confirm whether the machines for those parts will be running that day. Customer parts and drawings are not shown to visitors, including visitors from other customers.

Will the first reply include a price?

The first reply confirms whether the part is workable: material, wall, radius, whether a die already exists, and which documents can and cannot be issued. Pricing is prepared by the engineering team against the drawing — they check what is missing on it and whether tooling or setup adds cost — and is released after the owner has reviewed it. That is why it arrives as a separate reply rather than in the first message.

Starting points: tube bending capability · parts by industry · inspection and documents · the numbers behind the factory.