Big Diameter Steel Tube

Nominal Wall Thickness(mm)

nominal O.D

mm

5

5.5

6

7

8

9

10

11

12

13

14

15

16

18

20

22

219

32.02

37.10

273

40.01

46.42

52.78

-325

54.9

62.54

70.13

-377

60.18

68.57

76.92

-426

68.94

78.6

88.2

97.75

-529

86.48

98.64

110.75

122.81

134.82

146.78

158.69

-559

90.11

102.78

115.41

127.99

140.51

152.99

165.42

-630

104.09

118.76

133.39

147.96

162.48

176.96

191.39

-660

107.54

122.71

137.82

152.89

167.91

182.88

197.8

711

112.72

128.63

144.48

160.29

176.05

191.76

207.42

-720

121.52

138.69

155.8

172.87

189.88

206.85

223.76

-762

123.08

140.46

157.8

175.09

192.32

209.51

226.65

813

130.33

148.75

167.12

185.44

203.72

221.94

240.11

258.24

-820

139.13

158.81

178.44

198.02

217.55

237.03

256.46

278.88

914

140.34

160.19

179.99

199.75

219.45

239.1

258.71

276.26

297.77

317.23

256.01

394.58

432.96

-920

178.74

200.06

222.93

244.95

266.92

288.84

310.72

332.54

354.31

397.74

440.95

483.96

1016

179.92

202.19

224.41

246.58

268.7

290.77

312.79

334.76

356.68

400.4

443.91

486.13

-1020

198.86

223.49

248.08

272.62

297.1

321.54

345.93

370.27

394.56

443.02

491.26

539.3

1220

199.65

224.38

249.07

273.7

298.39

322.82

347.31

371.75

396.14

44.79

493.23

541.47

1420

296.39

327.95

357.47

386.94

416.36

445.73

475.58

533.58

591.88

649.98

1620

347.71

362.21

416.66

451.06

485.41

519.71

553.96

622.36

690.52

758.49

1820

397.03

436.46

475.84

515.17

554.46

593.6

632.87

711.14

789.17

867

2020

446.35

490.71

535.02

579.29

623.5

667.67

711.79

799.92

887.81

975.51

2220

495.67

544.96

594.21

643.4

692.55

741.65

796.7

888.7

986.46

1084.21

2420

544.99

599.21

653.39

707.52

761.6

815.63

869.61

977.48

1085.11

1192.53

594.34

635.5

712.62

771.62

830.2

889.66

948.6

1066.26

1183.75

1301

 Alloy pipe

 Cr5Mo. 

(P5,STFA25T5)

15CrMo

(P11/P12/STFA22)

13CrMo44

12Cr1MoV P22 

T91,P91,P9,

T9 Wb36

GB5310-95 GB9948-88

ASTMA335/A335M

ASTMA213/213M

DIN17175-79

JISG3467-88

JISG3458-88

16-824*2-100

 high pressure, high/low

temperature and is used in the industries   of petroleum,

chemical engineering and electric power as   well as boiler

High-pressure

 boiler pipe

20G,A106,

ST 45

GB5310-95

ASTM A 106-99

DIN17175-79

14-630*2-80

 Temperature-resistant seamless steel   pipe far high-pressure boiler

High-pressure 

seamless pipe for

 petroleum cracking

20, 12CrMo,

15CrMo

GB9948-88

10-530*1.5-36

 Boiler pipe for refinery, heat-exchanging pipe,   seamless steel pipe for pipeline

High-pressure

 seamless pipes for 

fertilizer making

 equipment

 20, 16Mn,

Q345

 GB6479-2000

18-530*3-40

 Fertilizer making equipment and pipe line

Low and medium-pressure

 boiler pipes

10,20

GB3087-1999

10-530*2-40

 Over-heat pipe for low and medium pressure   boiler, boiling water pipe, locomotive smoke pipe(big and small)

Fluid pipe

20, Q345

GB/T8163-1999

8-630*1.0-40

Fluid feeding

Structural pipe

20, Q345 10,

20,35,45, 

16Mn,Q345B

GB/T8162-1999

6-1020*1.5-100

For common structure

Line pipe

Gr.B

API

60-630*1.5-40

 Carrying gas, water or oil in the industries of   petroleum and natural gas

Hydraulic prop pipe

27SiMn

GB/T17396-1998

70-377*9-40

Hydraulic support and prop

Ship      pipe

410

GB/T5312-1999

14-426*1.5-45

 Pipes for ship, boiler and over-heater