Factory Price China Steel Welded Pipe High Quality Seamless Carbon
Steel Pipe
Certificate: API, JIS, GS
Grade: 1020 1045
Surface Treatment:painting
Tolerance: ±15%, ±20%
Processing Service: Welding, Punching, Cutting
Oiled or Non-oiled:Non-oiled
Invoicing: by actual weight
Delivery Time: 22-30 days
| Price: | Negotiated |
| MOQ: | 5 tons per size |
| Payment Terms: | T/T , L/C, Western Union |
| Trad terms: | FOB; CNF; CIF |
| Delivery time: | With 20 days after confirmed order |
| port | qingdao port |
Product introduction: Since the 1930s, with the rapid development
of continuous rolling production of high-quality strip steel and
the advancement of welding and inspection technology, the quality
of welds has been continuously improved, the varieties and
specifications of welded steel pipes have been increasing, and more
and more fields. Instead of seamless steel pipes. Welded steel
pipes are divided into straight seam welded pipes and spiral welded
pipes according to the form of the weld. Classification by
production method: process classification - arc welded pipe,
electric resistance welded pipe, (high frequency, low frequency)
gas welded pipe, furnace welded pipe.
Commonly used materials for welded pipes are: Q235A, Q235C, Q235B,
16Mn, 20#, Q345, L245, L290, X42, X46, X60, X80, 0Cr13, 1Cr17,
00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, etc.
The blanks used for welded steel pipes are steel sheets or strips,
which are divided into furnace welded pipes, electric welded
(resistance welded) pipes and automatic arc welded pipes due to
their different welding processes. Due to the different welding
forms, it is divided into two types: straight seam welded pipe and
spiral welded pipe. Because of its end shape, it is divided into
circular welded pipe and special-shaped (square, flat, etc.) welded
pipe.
Features
The production process of straight seam welded pipe is simple, the
production efficiency is high, the cost is low, and the development
is fast. The strength of the spiral welded pipe is generally higher
than that of the straight seam welded pipe. However, compared with
the same length of straight seam pipe, the length of the weld is
increased by 30~100%, and the production speed is lower.
Scope of application
The products are widely used in tap water engineering,
petrochemical industry, chemical industry, electric power industry,
agricultural irrigation, urban construction, and are one of the 20
key products developed in my country.
For liquid transportation: water supply, drainage. For gas
transportation: gas, steam, liquefied petroleum gas.
For structure: for piling pipe, for bridge; for wharf, road,
building structure, etc.
Welded pipes are divided into the following varieties due to their
different materials and uses:
GB/T3091-2008 (Welded steel pipes for low-pressure fluid transportation): mainly
used for conveying general low-pressure fluids such as water, gas,
air, oil and heating water or steam and other purpose pipes. Its
representative material is: Q235A grade steel.
GB/T14291-2006 (Welded Steel Pipe for Mine Fluid Conveying): Mainly used for
straight seam welded steel pipe for mine air pressure, drainage and
shaft discharge gas. It represents the material Q235A, B grade
steel.
GB/T12770-2002 (stainless steel welded steel pipe for mechanical structure):
mainly used for machinery, automobiles, bicycles, furniture,
decoration of hotels and restaurants, and other mechanical parts
and structural parts. Its representative materials are 0Cr13,
1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, etc.
GB/T12771-1991 (stainless steel welded steel pipe for fluid conveying): mainly
used for conveying low pressure corrosive medium. The
representative materials are 0Cr13, 0Cr19Ni9, 00Cr19Ni11, 00Cr17,
0Cr18Ni11Nb, 0017Cr17Ni14Mo2, etc.
In addition, welded stainless steel pipes for decoration (GB/T 18705-2002), stainless steel welded pipes for architectural decoration (JG/T
3030-1995), and welded steel pipes for heat exchangers
(YB4103-2000).
