Complaint
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 ≤2-3t | Rs under 3t | Carbon steel Rs under 3.5t | t < 6 t < 6 | Rs ≤ 2t Rs ≤ 2t | ||||||
| Low-alloy Rs under 4t | 6 ≤t≤10 6 ≤t≤10 | Rs≤2.5t Rs≤2.5t | |||||||||
| t>10 t>10 | Rs≤3t Rs≤3t | ||||||||||
| Distortion | 1.5%mm in total length 1mm in 1 meter is allowed | No obvious distortion | Under 75 | ≤2.5mm/m ≤2.5mm/m | |||||||
| Above 75 | ≤3mm/m ≤3mm/m | ||||||||||
| Wall thickness | In the range of corresponding tolerance standards of the material | ||||||||||
Generally speaking, it's around 15 days from the date of receiving payment.
If there any more question, please feel free to contact the sales without any hesitate.
