API 5L Line pipe is a type of steel pipe that is manufactured from
high strength carbon steel. It is typically made according to the
metallurgical specifications developed by the American Petroleum
Institute (API). This product can be used to build pipelines that
transport a variety of resources including natural gas, oil,
petroleum and water to petroleum and natural gas industry. Line
pipe is available in a variety of diameters ranging from 2 inches
to 48 inches. It includes seamless and welded carbon steel or
stainless steel piping. Because this steel pipe needs to withstand
high pressures, there are important tests to ensure our pipes meet
all the requirements of steel chemistry. Dynoland line pipe will
ensure safe and reliable pipeline service.
· The pipes are mainly made of B, X42, X46, X56, X65, X70, X80 and
other grade steel.
· Pipe ends include plain end, thread end and female end of pipe.
· The connection type of this steel pipe includes end welding,
coupling connection, socket connection.
· Executive standard of our line pipes is API 5L.
· The size and diameter can vary based on the amount of gas or
liquid that a pipe is intended to carry as well as the pressures
that a steel pipe must withstand.
· The thickness requirements are determined by the maximum
operating pressure required for a pipeline. Following proper safety
regulations when selecting and installing line pipes, we will
ensure proper pipeline operation and prevent dangerous or hazardous
t of sc��tr���>�ffectively prevent thread gluing, improve the
wear resistance of thread, and thereby enhance the service life of
the API 5DP drill pipe. Thickness of the nitration layer is
generally from 0.2 mm to 0.3 mm. Too large thickness is easy to
cause cracking flaws. Too small thickness will result in poor
thread gluing resistance. Integrated drill pipes should do
phosphate treatment with much smaller thickness, rather than
• 4) Joint thread should be processed by the thread turning tool on
the CNC lathe. We make efforts to improve the thread surface
quality, reduce the surface roughness (Ra ≤ 1.6μm), improve the
degree of finish and reduce stress concentration. These measures
can ensure the interchangeability of API 5DP drill pipes. The
standoff of joint threads should be controlled in a reasonable
range so as to ensure a good drill thread engagement.
• Our drill pipes' body has high tensile strength, good bending
performance and good toughness. The body uses carbon alloy seamless
steel pipe. Alloying elements should contain more Cr, Mo and other
elements to improve the tensile strength and impact toughness, and
contain Mn, Si and other elements to improve the elasticity of the
material (i.e. bending performance). Mechanical properties of API
5DP drill pipes are as follows:
Mechanical Properties of API 5DP Drill Pipes
· 1) Our drill pipes are manufactured in accordance with API 5DP
standards. It has low levels of P and S chemical compositions
(containing P with the amount of less than or equal to 0.015 and
with less than or equal to 0.003 S).
· 2) The body of Our API 5DP drill pipe has better thickness
evenness, fewer rolling defects and higher finished product rate.