product list

Seamless Steel Pipe

1.Definition of seamless steel pipe

Seamless pipe is a kind of hollow section without joint around the strip of steel.

2.Seamless steel pipe manufacturing process

Steel Round Bar—Pickling Grinding—Cutting—Heating—Hot Piercing—Punching—Shell Storage—Pickling&Lubrication—Cold-Rolling—Cold-Drawing—Heat Treatment—Physical&Chemical Testing—Straightening—Trim—Size&Surface Inspection—Eddy Current Testing—Hydraulic Testing—Supersonic Testing—Get Oiled—Packing—Warehouse

3.Advantages of seamless steel pipe

1, seamless steel pipe is light, its weight is only 1/5 square steel;

2, seamless steel pipe has corrosion resistance, acid, alkali, salt and atmospheric environment corrosion, high temperature resistance, with good impact resistance and fatigue resistance It doesn’t need maintenance regularly , It can be used more than 15 years;

3, seamless steel pipe tensile strength is more 8-10 times than ordinary steel, elastic modulus is better than steel, with excellent creep resistance, corrosion resistance and shock resistance;

4, seamless steel pipe has excellent mechanical performance and machined easily , etc.

5, seamless steel pipe has highly elastic, reused in mechanical equipment, memoryless, non-deformation, and antistatic.

4.Seamless pipe applications

It used for fluid conveying pipe, boiler plant, engineering, machinery processing plant.

5.Seamless specifications

Product nameGradeStandardSpecification
Alloy pipe12Cr1MoVG
12CrMoG
15CrMoG
12Cr2Mo<A335P22>
Cr5Mo<A335P5>
Cr9Mo<A335P9>
10Cr9Mo1VNb<A335P91>
15NiCuMoNb5<WB36>
12Cr2MoWVTiB<钢研
102>
GB5310-1995
GB6479-2000
GB9948-2006
DIN17175-79
ASTM SA335
ASTM SA213
JISG3467-88
JISG3458-88
∮8-1240*1-200
Stainless steel pipe0Cr18Ni9<304>
00Cr19Ni10<304L>
00Cr25Ni20<310S>
0Cr17Ni12Mo2<316>
00Cr17Ni14Mo2<316L>
1Cr18Ni9Ti<321>
0Cr18Ni10Ti
0Cr18Ni11Nb<347>
GB/T14975-2002
GB/T14976-2002
GB13296-2007
ASTM A213
ASTM A269
ASTM A312
JIS G3459
DIN 17458
∮6-630*0.5-60
Cryotron16MnDG、
10MnDG、
09DG
09Mn2VDG、
06Ni3MoDG
ASTM A333Grade1
ASTM A333Grade3
ASTM A333Grade4
ASTM A333Grade6
ASTM A333Grade7
ASTM A333Grade8
ASTM A333Grade9
ASTM A333Grade10
ASTM A333Grade11
GB/T18984-2003
ASTM A333
∮8-1240*1-200
High pressure  boiler tube20G
ASTM SA106B/C
ASTM SA210A/C
ST45.8-III
GB5310-1995
ASTM SA106
ASTM SA210
DIN17175-79
∮8-1240*1-200
High pressure   fertilizer pipe10
20
16Mn
GB6479-2000∮8-1240*1-200
Petroleum cracking  steel pipe10
20
GB9948-2006∮8-630*1-60
Low pressure pipe10#
20#
16Mn<Q345A.B.C.D.E>
GB3087-2008∮8-1240*1-200
Fluid transportation pipe10#、20#ASTM A106A,B,C、A53A,B
16Mn<Q345A.B.C.D.E>
GB/T8163-2008
ASTM A106
ASTM A53
∮8-1240*1-200
Structure pipe10#、20#、45#、27SiMn ASTM A53A,B
16Mn<Q345A,B,C,D,E>
GB/T8162-2008
GB/T17396-1998
ASTM A53
∮8-1240*1-200
CasingJ55、K55、N80、L80C90、C95、P110API SPEC 5CT
ISO11960
∮60.23-508.00
*4.24-16.13
Seamless pipe lineA、B、X42、X46、X52、X56、X60、X65、X70、X80L245、L290、L360、L415、L450API SPEC 5L
GB/T9711.1
GB/T9711.2
∮32-1240*3-100
LSAW20、Q195、Q215A,BQ235A,B、Q345A,B,C,D,EGB/T13793-1992
GB3091-2001
∮32-630*1-30
SSAWQ235A-B、Q345A-ESY/T5037-2000219-2820*4-20

6.The difference between seamless pipe and welded pipe

  1. The raw materials are different

Seamless steel pipe material has ordinary and high quality carbon structural steel (Q215-A ~ Q275-A and 10 ~ 50 steel), low alloy steel (09MnV, 16Mn, etc.), alloy steel, stainless acid-resistant steel, etc.;

The welded pipe is made of steel plate or strip after crimping and welding.

2.Usages are different

Seamless steel pipe is mainly used for petroleum geology drilling pipe, petrochemical cracking pipe, boiler tube, bearing tube and automotive, tractor, aviation high precision structure steel pipe;

Welded pipe is widely used in water engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, urban construction.

Welding pipe is for liquid transport: water supply, drainage. For gas transmission: gas, steam, liquefied petroleum gas; For structure,pile pipe, bridge, wharves, roads, building structures, etc.

7.Seamless pipe standard

1. Seamless steel pipe for structure (GBT8162-2008). Mainly used in general structure and mechanical structure. Its representative material (grade): carbon steel, 20, 45 steel; Alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.

2. Seamless steel pipe for conveying fluid (GBT8163-2008).

3. Seamless steel tube for low and medium pressure boiler (GB3087-2008)

4. Seamless steel tube for high pressure boiler (GB5310-2008)

5. Seamless steel pipe for high pressure fertilizer equipment (GB6479-2000)

6. Seamless steel pipe for petroleum cracking (GB9948-2006).

7. Steel pipe for geological drilling (YB235-70)

8. Seamless steel pipe for diamond core drilling (GB3423-82)

9. Oil drilling pipe (YB528-65)

10. Marine carbon steel and carbon manganese steel seamless steel pipes (GB/T 5312-2009)

11. Seamless steel pipe (GB3088-82) for automobile half shaft sleeve pipe

12. High pressure tubing for diesel engine (GB3093-86)

13. Seamless steel tubes with precision inner diameter for hydraulic and pneumatic cylinders (GB8713-88)

14. Cold-drawn or cold-rolled precision seamless steel pipe (GB3639-83)

1 5. Stainless steel seamless steel pipe for structure (GB/T14975-2002)

16. Seamless stainless steel pipe for fluid transport (GB/T14976-2002)

17. Seamless steel pipe for gas cylinders (GB18248-2000).

Gb3093-1986 (high-pressure seamless steel pipe for diesel engine),

GB/T3639-1983(cold drawn or cold rolled precision seamless steel pipe),

GB/T3094-1986(cold-drawn seamless steel tube, special-shaped steel tube),

GB/T8713-1988(Precision inner diameter seamless steel tubes for hydraulic and pneumatic tubes)

Gb13296-1991 (stainless steel seamless steel tubes for boilers and heat exchangers)

GB/T14975-2002(stainless steel seamless steel pipe for structure),

GB/T14976-2002(seamless stainless steel pipe for fluid transport),

GB/T5035-1993(seamless steel pipe for automobile half axle sleeve),

API SPEC5CT-1999(Casing and Tubing Specification), etc.

author:

High-quality steel pipe certified manufacturer

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