Joho Steel Co., Ltd
JOHO STEEL CO.,LTD, founded in 1988, is a steel group which has integrated steel production, processing and trading into one. We specializes in manufacturing carbon seamless steel pipes, boiler tube
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1,Products Description:
Hot-rolled seamless steel pipes are commonly used in a wide range of applications, including construction, automotive,oil and gas,and machinery industries.They are known for their strength,durability,and resistance to pressure and high temperatures.These pipes are typically used in situations where high strength and reliability are required.
| Out Diameter | Wall Thickness | Types | ||
| 1/4 - 36 inch 6.35 - 914.4mm | 1.25mm - 50mm SCH10,SCH40,SCH60,XS,SCH80,STD,XXS | CS Seamless Pipe SS Seamless Pipe GI Seamless Pipe |
| ASTM standard | Black and hot-dipped zinc-coated steel pipes welded and seamless | ASTM A53 |
| Seamless carbon steel for high temperature service | ASTM A106 | |
| Seamless cold-drawn low-carbon steel heat exchanger and condenser tubes | ASTM A179 | |
| Seamless carbon steel boiler tubes for high pressure | ASTM A192 | |
| Seamless Medium-carbon boiler and superheater tubes | ASTM A210 | |
| Seamless carbon for mechanical tubing | ASTM A519 | |
| API standard | Seamless steel pipe for casing | API Spec 5CT |
| Seamless steel pipe for line pipe | API Spec 5L | |
| DIN standard | Seamless steel tube for elevated temperture | DIN 17175 |
| Cold drawn seamless prevision pipe | DIN2391 | |
| Seamless circular unalloyed steel tubes subject to special requirements | DIN 1629 | |
| GB standard | Seamless steel pipe for structural purpose | GB/T8162-2008 |
| Seamless steel pipe for liuid service | GB/TB8163-2008 | |
| Seamless steel tubes for low and medium boiler | GB/3087-1999 | |
| Seamless steel tubes for high pressure boiler | GB/5310-1995 | |
| Seamless carbon steel marine tubes | GB/T5312-1999 | |
| High-pressure seamless steel tubes for chemical fertilizer equipments | GB/6479-2000 |
2,Hot-rolled seamless steel tube manufacturing process:
Seamless piping begins as a solid cylindrical hunk of steel called a billet. While still hot, billets are pierced through the center with a mandrel.The next step is rolling and stretching the hollow billet.The billet is precisely rolled and stretched until it meets the length, diameter and wall thickness as specified by the customer order.
Round Tube Billet →Heating →Piercing → Three-Roll Cross Rolling, Continuous Rolling Or Extrusion → Tube Removal → Sizing (Or Reducing) → Cooling → Billet Tube → Straightening → Water Pressure Test (Or Flaw Detection) → Mark → Warehousing
Properties:
➧High dimensional accuracy:Hot rolling process produces tubes with uniform dimensions and thickness.
➧Superior surface finish:The surface finish is smooth and has fewer defects.
➧Excellent mechanical properties:Hot rolled tubes have high strength, durability, and toughness.
➧Greater strength and durability:The manufacturing process of the tubes results in a denser and stronger metal structure.
➧Uniformity in shape and size:The hot rolling process produces tubes that are consistent in shape and size.
3,Product Applications
a,Oil and Gas industry:Seamless steel pipes are extensively used for transportingcrude oil,natural gas,and refined petroleum products.Their high strength and resistance to corrosion make them ideal forofshore drilling,onshore pipelines,and refineries.
b,Power Generation:Seamless steel pipes play a crucial role in the power generation industry,particulariyin boiler tubes.They efficiently handle high temperature and high-pressure conditionsensuring the smooth operation of power plants.
c,Automotive Sector:In the automotive industry,seamless pipes are used formanufacturing exhaust systems,hydraulic cylinders,andother critical components due to their strength,precision,andresistance to corrosion.
d,Construction and infrastructure:Seamless pipes are employred in the construction of buildings bridges,and other infrastructure projects for water supply,plumbing,and structural support,thanks to their durability and uniformity.
e,Aerospace and Defense:Seamless steel pipes find applications in the aerospace anddefense sectors for hydraulic and fuel lines in aircraft,missilesand spacecraft,where reliability and weight optimization areparamount.
f,Mechanical and Engineering:Seamless pipes are used in various mechanical and engineering applications,including machinery manufacturing precision components,and hydraulic systems.
4,Packing & Delivery
Shipping method:By container,LCL or bulk vessle
Packaging:Wooden pallets or cases,waterproof paper and plastic coverage,or as to clients's requirement