Product NameQ235 material straight seam welded pipe carbon
steel welded tubeFabrication StandardAPI 5L/5CT ASTM A53 A252
A500 EN10217 EN10219 Material GradeGR. A/B x42 x52
x65 GR.2 GR.3 S235 S355Out DiameterDN5 - DN80 00Wall
Thickness3mm - 50mmLength max 75 MtrSurfacebare or with
coatingCoatingFBE, 3LPP, 3LPE, Epoxy, Coal Tar ExpoxyPackageby
piece or in bundlesMinimum Order Quantity5 TonsEZS
Advantage1.regular sizes in stock over 2000 tons for immediate
delivery2.small quantity with factory rate3.quality certificate as
per EN10204 3.1b issued by manufacturer4.expert technical and
export/import document consultant and support5. on-time response by
email, skype, website and online messagesStraight seam pipe is a
kind of welded steel pipe, which refers to the steel pipe with the
weld and the steel pipe longitudinally parallel. According to the
wall thickness, there are thin-walled straight seam pipes and
thick-walled straight seam pipes; According to the shape, there are
round tubes, square tubes or special-shaped tubes; According to the
use, there are general welded pipes, galvanized welded pipes,
oxygen blowing welded pipes, wire casing pipes, metric welded
pipes, idler pipes, deep well pump pipes, automotive pipes,
transformer pipes, electric welded thin-walled pipes, electric
welded special-shaped pipes and spiral welded pipesStraight seam
pipe refers to a steel pipe whose weld is longitudinally parallel
to the steel pipe. It is also generally referred to as straight
seam welded pipe or straight seam steel pipe. Straight seam pipe is
rolled by a high-frequency welding unit and welded by straight
seam. The specifications of straight seam pipes are expressed by
nominal caliber, and can be divided into thin-walled straight seam
pipes and thick-walled straight seam pipes according to wall
thickness. According to the shape, it can be divided into round,
square or special-shaped tubes.
Classified by weld shape It can be
divided into straight seam welded pipe and spiral welded pipe
Straight seam welded pipe: simple production process, high
production efficiency, low cost and rapid development. Spiral
welded pipe: the strength is generally higher than that of straight
seam welded pipe, and a narrower billet can be used to produce
welded pipes with larger pipe diameters, and welded pipes with
different diameters can also be produced with the same width of
blank. However, compared with the straight seam pipe of the same
length, the weld length is increased by 30~100%, and the production
speed is lower. Therefore, most of the smaller diameter welded
pipes use straight seam welding, and the large-diameter welded
pipes mostly use spiral welding. Categorized by use According to
the use, it is divided into general welded pipe, galvanized welded
pipe, oxygen blowing welded pipe, wire casing, metric welded pipe,
idler pipe, deep well pump pipe, automotive pipe, transformer pipe,
electric welded thin-walled pipe, electric welded special-shaped
pipe and spiral welded pipe. General welded pipe: General welded
pipe is used to transport low-pressure fluid. Made of Q195A, Q215A,
Q235A steel. It can also be manufactured from other mild steels
that are easy to weld. Steel pipe to carry out water pressure,
bending, flattening and other experiments, there are certain
requirements for surface quality, usually the delivery length is
4-10m, often require fixed length (or double ruler) delivery. The
specifications of the welded pipe are expressed with a nominal
caliber (millimeters or inches) The nominal caliber is different
from the actual one, the welded pipe has two kinds of ordinary
steel pipe and thickened steel pipe according to the specified wall
thickness, and the steel pipe is divided into two kinds of threaded
and unthreaded according to the form of the pipe end. Galvanized
steel pipe: In order to improve the corrosion resistance of steel
pipe, the general steel pipe (black pipe) is galvanized. Galvanized
steel pipe is divided into hot-dip galvanized and electric steel
zinc, hot-dip galvanized galvanized layer is thick,
electro-galvanizing cost is low. Oxygen blowing welded pipe: used
as a pipe for steelmaking oxygen blowing, generally using
small-diameter welded steel pipe, the specification is from 3/8
inches to 2 inches eight. Made with 08, 10, 15, 20 or Q195-Q235
steel strip. In order to prevent corrosion, some are treated with
aluminum. Wire casing: is also ordinary carbon steel welded steel
pipe, used in concrete and various structural power distribution
projects, commonly used nominal diameter from 13-76mm. The walls of
the wire casing are thin, and most of them are coated or galvanized
after use, requiring a cold bending test. Metric welded pipe: the
specification is in the form of seam
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