Q355B seamless steel pipe is a high-strength, high-quality steel
pipe product with excellent properties such as strength, toughness,
corrosion resistance and high temperature resistance. The steel
pipe is suitable for petroleum, chemical industry, aerospace,
machinery manufacturing, electric power and other fields. The
national standard GB/T8163-2018 "Seamless Steel Pipe" stipulates
the size, quality, technical requirements, inspection rules,
packaging, marking and numbering of seamless steel pipes.
The outer diameter range of Q355B seamless steel pipe is 10-426mm,
the wall thickness range is 1-40mm, and the length is generally
5000-12000mm, and the length can also be processed according to
user requirements. Q355B seamless steel pipe should have high
physical and chemical properties, such as tensile strength, yield
strength, elongation, hardness, impact toughness and other
indicators, and it is required that the pipe has no cracks,
bubbles, inclusions, twists and other defects.
Q355B seam steel pipe should be processed according to the
specified production process, such as steel pipe rolling, heat
treatment, surface treatment, etc., and at the same time, it is
required to control appropriate processing parameters to ensure the
performance and quality of the steel pipe. Q355B seamless steel
pipes should be inspected in accordance with standard inspection
procedures, such as chemical composition analysis, mechanical
property inspection, hardness inspection, appearance inspection,
eddy current inspection, etc.
Q355B seamless steel pipes should be packaged according to
packaging standards, such as wooden box packaging with steel belts.
Q355B seamless steel pipes shall be marked and numbered on the
pipes in accordance with the standard, such as grade, size, batch
number, manufacturer and other information. In general, the
standard of Q355B seamless steel pipe contains various
requirements, which can provide reference for steel pipe
manufacturers and users, and ensure the quality and performance of
steel pipesZhengde hot-rolled seamless steel pipe is a long strip of steel
with a hollow section and no joints around it. The steel pipe has a
hollow cross-section and is widely used as a pipeline for
transporting fluids, such as pipelines for transporting oil,
natural gas, gas, water and certain solid materials. Compared with
solid steel such as round steel, seamless steel pipe is lighter in
weight when the bending and torsional strength is the same. It is
an economical section steel and is widely used in the manufacture
of structural parts and mechanical parts, such as oil drill pipes
and automobile transmission shafts. , bicycle racks and steel
scaffolding used in building construction, etc. The use of seamless
steel pipes to manufacture ring parts can improve the utilization
rate of materials, simplify the manufacturing process, save
materials and processing hours, such as rolling bearing rings, jack
sets, etc., which have been widely used in steel pipes. Hot-rolled
seamless steel pipe is also an indispensable material for various
conventional weapons. Gun barrels, barrels, etc. must be made of
steel pipes.
thick Φ | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 8 | 8.5 | 9 | 10 | 12 |
32 | 2.146 | 2.46 | 2.762 | 3.052 | 3.329 | 3.594 | 3.847 | 4.088 | | | | | | |
38 | 2.589 | 2.978 | 3.354 | 3.718 | 4.069 | 4.408 | 4.735 | 5.049 | | | | | | |
42 | 2.885 | 3.323 | 3.749 | 4.162 | 4.562 | 4.951 | 5.327 | 5.691 | | | | | | |
45 | 3.107 | 3.582 | 4.044 | 4.495 | 4.932 | 5.358 | 5.771 | 6.172 | | | | | | |
50 | 3.477 | 4.014 | 4.538 | 5.049 | 5.549 | 6.036 | 6.511 | 6.973 | 7.423 | 8.286 | 8.699 | | | |
54 | 3.773 | 4.359 | 4.932 | 5.493 | 6.042 | 6.578 | 7.103 | 7.614 | 8.114 | 9.075 | 9.538 | | | |
57 | 3.995 | 4.618 | 5.228 | 5.826 | 6.412 | 6.985 | 7.546 | 8.095 | 8.632 | 9.667 | 10.167 | | | |
60 | 4.217 | 4.877 | 5.524 | 6.159 | 6.782 | 7.392 | 7.99 | 8.576 | 9.149 | 10.259 | 10.796 | | | |
63.5 | 4.476 | 5.179 | 5.869 | 6.548 | 7.214 | 7.867 | 8.508 | 9.137 | 9.754 | 10.95 | 11.529 | | | |
68 | 4.809 | 5.567 | 6.313 | 7.047 | 7.768 | 8.477 | 9.174 | 9.858 | 10.53 | 11.838 | 12.473 | | | |
70 | 4.957 | 5.74 | 6.511 | 7.269 | 8.015 | 8.749 | 9.47 | 10.179 | 10.876 | 12.232 | 12.892 | 13.539 | 14.797 | 17.164 |
73 | 5.179 | 5.999 | 6.807 | 7.602 | 8.385 | 9.156 | 9.914 | 10.66 | 11.394 | 12.824 | 13.521 | 14.205 | 15.537 | 18.052 |
76 | 5.401 | 6.258 | 7.103 | 7.935 | 8.755 | 9.563 | 10.358 | 11.141 | 11.912 | 13.416 | 14.15 | 14.871 | 16.277 | 18.94 |
89 | 6.363 | 7.38 | 8.385 | 9.378 | 10.358 | 11.326 | 12.281 | 13.225 | 14.156 | 15.981 | 16.875 | 17.756 | 19.483 | 22.787 |
108 | 7.768 | 9.02 | 10.259 | 11.486 | 12.701 | 13.903 | 15.093 | 16.27 | 17.436 | 19.729 | 20.858 | 21.973 | 24.168 | 28.41 |
133 | | 11.178 | 12.725 | 14.261 | 15.783 | 17.294 | 18.792 | 20.278 | 21.751 | 24.662 | 26.098 | 27.522 | 30.334 | 35.809 |
159 | | 13.422 | 15.29 | 17.146 | 18.989 | 20.821 | 22.639 | 24.446 | 26.24 | 29.791 | 31.548 | 33.293 | 36.746 | 43.503 |
219 | | 18.601 | 21.209 | 23.805 | 26.388 | 28.959 | 31.517 | 34.064 | 36.598 | 41.629 | 44.126 | 46.61 | 51.543 | 61.259 |
273 | | 23.262 | 26.536 | 29.797 | 33.046 | 36.283 | 39.508 | 42.72 | 45.92 | 52.283 | 55.445 | 58.596 | 64.86 | 77.24 |
325 | | 27.75 | 31.665 | 35.568 | 39.458 | 43.337 | 47.202 | 51.056 | 54.897 | 62.542 | 66.346 | 70.137 | 77.684 | 92.629 |
355 | | | | 38.897 | 43.158 | 47.406 | 51.641 | 55.865 | 60.076 | 68.46 | 72.634 | 76.796 | 85.082 | 101.507 |
377 | | | | 41.339 | 45.871 | 50.39 | 54.897 | 59.391 | 63.873 | 72.801 | 77.246 | 81.679 | 90.508 | 108.018 |
426 | | | | 46.777 | 51.913 | 57.036 | 62.147 | 67.246 | 72.332 | 82.468 | 87.518 | 92.555 | 102.592 | 122.519 |
450 | | | | | | | | 71.093 | 76.475 | 87.203 | 92.549 | 97.882 | 108.511 | 129.621 |
480 | | | | | | | | 75.902 | 81.654 | 93.122 | 98.837 | 104.54 | 115.909 | 138.499 |
530 | | | | | | | | 83.917 | 90.286 | 102.987 | 109.319 | 115.638 | 128.24 | 153.296 |
630 | | | | | | | | 99.947 | 107.549 | 122.716 | 130.281 | 137.833 | 152.902 | 182.89 |
Our Advantages
Three-roll pipe mill
The seamless steel pipe produced by the three-roll mill for
hot-rolling seamless steel pipe has high precision. Because of the
cross-rolling with the mandrel, the rolling action is repeated many
times in one pass, which greatly improves the accuracy of the wall
thickness and is not easy to produce. Defects such as scratches,
ears, and green lines; the flexibility in production is large, and
the pass size can be changed with the help of the clutch of the
roll.
Adequate inventory
Standing inventory of carbon seamless tubes, seamless
special-shaped tubes, alloy seamless tubes, precision tubes.
Various types of seamless steel pipes with a specification of
5-426*0.5-60mm and a length of 2-16m. The cold-rolled precision
bright tubes produced by our factory have smooth appearance,
uniform wall thickness, no oxide layer, and high precision. The
inner hole of the steel pipe can be divided into round type, spline
type, plum blossom type, etc. It is widely used in automobiles,
motorcycles, electric power, petrochemicals, ships, aerospace,
bearings, pneumatic components, oil cylinders, boiler equipment,
medical equipment, fitness equipment and other industries.
Attention to detail
No matter how to choose the hot-rolled seamless steel pipe, its
quality cannot be ignored. It must be noted that there should be no
defects on the surface, such as small cracks or scars, etc., and
that the thickness of the pipe wall is the same to ensure
uniformity. The physical comparison is still very important. Only
after the basic comparison of the physical objects is done, can the
steel pipes that meet the needs be selected. The processing
technology of each seamless steel pipe is different, which will
also affect its application field. Now it is generally processed by
cold drawing and hot rolling, and the processing effect of the two
and the application of steel pipes will also have certain
differences.
Applicable scene
Hot-rolled seamless pipes specifically include low and medium
pressure boiler steel pipes, high-pressure boiler steel pipes,
seamless steel pipes for ships, petroleum cracking steel pipes,
seamless steel pipes for high-pressure fertilizer equipment, oil
jacket steel pipes, pipeline steel pipes, hollow sucker rods, and
ordinary fluid steel pipes. , structural seamless steel pipes and
imported alloy steel pipes, etc., with rich varieties and complete
specifications, widely used in petroleum, chemical, electric power,
boilers, ships, machinery and other industries, and have been sold
all over the world.
Quality first: production and inspection in strict accordance with
production standards;
Price advantage: discounts based on real market prices;
Transaction security: There will be no loss of customer funds;
After-sales guarantee: the customer's problem is our problem;
Long-term cooperation: quality assurance, price advantage, sincere
service can last for a long time.Detailed Photos
Packaging & Shipping
Company Profile
Shandong Zhengde Metal Manufacturing Co., Ltd. is a production and sales company integrating hot-rolled steel
coils, cold-rolled steel coils, galvanized steel coils,
color-coated steel coils, section steel, steel pipes, steel wires,
metal mesh, stainless steel, aluminum, copper and other metal
products integrated large enterprises. Five production and sales
bases have been formed in Binzhou, Liaocheng, Wuxi, Tianjin, Jinan
and Tai'an, with more than 100 production lines, 4 nationally
recognized laboratories, 2 technical engineering centers, and 5
enterprise technology centers. Products are exported to more than
50 countries and regions such as North America, South America,
Europe, Africa, Oceania, Middle East, and Southeast Asia.
Certifications