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1、Structure of Carbon Seamless Steel Pipe API 5L of 4 Inch:
Seamless pipe is formed by drawing a solid billet over a piercing rod to create the hollow shell.
As the manufacturing process does not include any welding, seamless pipes are perceived to be stronger and more reliable.
Historically seamless pipe was regarded as withstanding pressure better than other types, and was often more easily available than welded pipe.
Standard: GB3087: Seamless Steel Tubes for Low and Medium Pressure Boiler
2、Main Features of the Seamless Pipe API 5L of 4 Inch
• High manufacturing accuracy
• High strength
• Small inertia resistance
• Strong heat dissipation ability
• Good visual effect
• Reasonable price
3、Seamless Pipe API 5L of 4 Inch Specification：
GB, DIN, ASTM
ASTM A106-2006, ASTM A53-2007
10#, 20#, 45#, 16Mn
8 - 33 mm
133 - 219 mm
Place of Origin
Shandong, China (Mainland)
Secondary Or Not
factory state or painted black
Alloy Or Not
20#, 45#, Q345, API J55, API K55, API L80, API N80, API P110, A53B
4、Packaging & Delivery
seaworthy package,bundles wrapped with strong steel strip
15-30days after received 30%TT
5、FAQ of Seamless Pipe API 5L of 4 Inch:
Q1: Why buy Materials & Equipment from OKorder.com?
A1: All products offered byOKorder.com are carefully selected from China's most reliable manufacturing enterprises. Through its ISO certifications, OKorder.com adheres to the highest standards and a commitment to supply chain safety and customer satisfaction.
Q2: How do we guarantee the quality of our products?
A2: We have established an advanced quality management system which conducts strict quality tests at every step, from raw materials to the final product. At the same time, we provide extensive follow-up service assurances as required.
Q3: How soon can we receive the product after purchase?
A3: Within three days of placing an order, we will begin production. The specific shipping date is dependent upon international and government factors, but is typically 7 to 10 workdays.
Q4: What makes stainless steel stainless?
A4: Stainless steel must contain at least 10.5 % chromium. It is this element that reacts with the oxygen in the air to form a complex chrome-oxide surface layer that is invisible but strong enough to prevent further oxygen from "staining" (rusting) the surface. Higher levels of chromium and the addition of other alloying elements such as nickel and molybdenum enhance this surface layer and improve the corrosion resistance of the stainless material.
Q5: Is there a difference in thermal conductivity between stainless steel and steel?
A5: Yes. Stainless Steel has a lower thermal conductivity rate than steel; approximately 1/3 to 1/5th depending on the material.
Q6: Is there a difference in electrical conductivity between stainless steel and steel?
A6: Yes. Steel is generally more conductive than stainless steel. Steel has resistivity in the range of 10~20Ωm, while stainless has a resistivity of approximately 60~72Ωm.
6、Seamless Pipe API 5L of 4 Inch Images：
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