What we can do for you?
All products of our company can be manufactured according to GB, DIN, JIS, ASTM or other national standards. The product types include round pipe, square pipe, rectangular pipe, elliptical pipe, flat elliptical pipe, semicircle pipe, arch pipe, D-shaped pipe, fan-shaped pipe, triangle pipe, pentagonal pipe, hexagonal pipe, octagonal pipe, trapezoidal pipe, and various complex cross-section special-shaped steel pipe and open profile. The shape of the above products can be made of carbon steel or stainless steel pipe and other materials, and the product size range is from 19 * 19 The products are widely used in construction, machinery, automobile, ship, railway, engineering automobile, furniture, sports equipment, doors and windows, containers and other industries, and can be produced with ordinary steel, high strength steel, stainless steel, copper, titanium alloy and other materials. Our company with high quality service, good reputation, reasonable price to provide users with satisfactory products. Our company adopt strict management mode and quality assurance system, takes the market as the guidance, takes the science and technology as the backing, innovates unceasingly.
Standards and tolerance of our products:
Tolerance Of Size And Angle | |||||||||||
QBTTS01 Usually (Special) | JISG3466(Japan) | GB6728-2002(China) | GB3094-2000(China) | ||||||||
A.B mm | Under 50 | ±0.5 | 250 250 | ±2.0 ±2.0 | Under 30 | ±0.3(ordinary) | ±0.2(advanced) | ||||
<100 Under 100 | ±0.5(±0.25) | Under100 | ±1.5 | 100 | ±0.8 | 300 | ±2.4 | 30-50 | ±0.4(ordinary) | ±0.3(advanced) | |
≥100 Above 100 | ±0.8% ( ±0.5%) | Above 100 | ±1.5% | 150 | ±1.2 | 350 | ±2.8 | 50-75 | ±0.8%(ordinary) | ±0.7%(advanced) | |
200 | ±1.6 | 400 | ±3.2 | Above 75 | ±1%(ordinary) | ±0.8%(advanced) | |||||
Level degree mm | Under 100 | Under ±0.5(±0.3) | Under 100 | Under ±0.5 | Under 60 | ±0.4 | 50-75 | ±0.8%(ordinary) | ±0.5%(advanced) | ||
Above 100 | Under 0.5% (0.4%) | Above 100 | A,B ±0.5% | Above 60 | 0.6% | Above 75 | ±0.9%(ordinary) | ±0.6%(advanced) | |||
Contained angle of adjoint level | ±1.0°( ±0.5°) | ±1.5° | |||||||||
Bending degree | 1.5mm in total length 1mm in 1 meter is allowed | Total length is under 0.3% | Each meter is not greater than 2, the total length is not greater than 0.2% | Per meter ≤ 4.0mm, total length ≤ 0.4% | |||||||
Angle department | Rs ≤2-3t | Rs under 3t | Carbon steel Rs under 3.5t | t < 6 | Rs ≤ 2t | ||||||
Low-alloy Rs under 4t | 6 ≤t≤10 | Rs≤2.5t | |||||||||
t>10 | Rs≤3t | ||||||||||
Distortion | 1.5%mm in total length 1mm in 1 meter is allowed | No obvious distortion | Under 75 | ≤2.5mm/m | |||||||
Above 75 | ≤3mm/m | ||||||||||
Wall thickness | In the range of corresponding tolerance standards of the material |
Note:
(1)QBTTS01-TTS enterprise internal standard, cold formed steel hollow sections for general structure
(2)JISG3466-the standard of rectangle type steel tubes that generally constructed and used in Japan
(3)GB/T6728-2002-cold formed steel hollow sections for general structure
GB3094-2000-cold drawn shaped steel tubes
(4)Other special precision is according to the agreement signed by both sides of supply and demand
(5)The welded joint usually in the middle of the heterogeneous type tube broadside, please propose in addition for special demand
(6)Carbon steel type: Q195-Q345, 10#-45#, and so on; Stainless steel type: SUS304, 316, 321, titanium alloy, pure titanium and so on.
Seamless Steel Tube Order Details
MOQ | 1 ton |
Sample | Sample Available |
Payment Terms | L/C,T/T |
Trade Term | FOB, CFR, CIF |
Port | Shanghai, Tianjin, Qingdao |
Package |
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Marking | (a) without marking, (b) marked with colored stripes on the tubes (tube bundles), (c) marked with spray either by a white or black color using Inkjet, (d) marked by stamping the data (this applies to OD > 22 mm and WT >2.3 mm). |
Surface Protection | Inter paper available PVC protecting film available Tip: While ordering, it is necessary to agree upon the methods and means of temporarily protecting the surface of the tubes during transportation and storage. |


Our Group, certified by ISO and SGS, is a high-tech enterprise integrating research, development, production and sales of steel pipesmade of stainless steel, carbon steel and alloy steel. HYT owns independent steel pipe factories with 50+ high precision cold drawingand cold rolling production lines, which can meet customers' requirements on the quality, quantity, precision and customization of steel pipes.




We sincerely hope to establish a long-term and extensive strategic partnership with ourcustomers for mutual benefit and common development!

What's keeping you from placing your order?
1,Who is HYTHYT is a manufacturer specializing in steel exporting business for 8 years. HYT main steel products include plate, sheet, coil, strip, bar, pipe, tube, etc. made of stainless steel, carbon steel and alloy steel.
2,How long is HYT steel pipe delivery time?
lt takes around 3-5 days for the regular models, and 7 to 10 working days for the special sizes and processing. lt is based on the order quantity and requirement.
3,Does HYT provide samples? Is it free or extra?
Yes, we would send you small samples for free; the size is 80x110mm. And the sample book is 250x350mm. Most of models have stock, and also can be customized and need around 4 to 6 days.
4,What are terms of delivery and payment?
Accepted Delivery Terms: EXW,FOB,CFR,CIF,DDU,DDP
Accepted Payment Terms: T/T, L/C, D/P, etc.
5,Does HYT have any assurance for steel products?
You will get a physical and mechanical test report of the product that you order from steel mill. In addition, you can enjoy free exchange and return policy due to steel product quality and after-sales warranty for 1 year.
6,Does HYT offer a service for customized products?
Yes, we can produce customized products exactly as your specification and CAD drawing.