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Chemical Engineering Seamless Steel Tube

Chemical Engineering Seamless Steel Tube
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Seamless tube for chemical engineering is mainly applied to chemical fertilizer equipment to deliver high temperature and high pressure fluid. The representative materials are 16Mn, 12CrMo, 12Cr2Mo, and so forth. Seamless steel pipe for chemical engineering is suitable for the chemical equipment with the working temperature of -40℃ to 400℃ and the working pressure of 10 Ma to 30 Ma. This seamless tube is also applicable to pipelines of high-quality carbon structural steel and alloy steel.

Advantages of Seamless Steel Pipe
  • Roller Tube
  • JST adopts advanced pipe rolling mill and pipe billet structure to guarantee high dimension precision and high quality surface of seamless tubes and meet the performance requirements of hot rolled finished seamless steel pipes. JST hot rolling machines include φ110 AccuRoll, φ140 Assel and φ273 Diesel types. The φ110 AccuRoll tube rolling mill features flexible production, wide product range, convenient replacement of varieties and specifications, and wide application. The φ140 Assel tube rolling mill includes annular heating furnace, conical punching machine, Assel pipe mill, 14 sets of three roll micro tension sizing mill, etc. The processing technology of this rolling mill for seamless tube is in the international leading level. The φ273 Diesel rolling mill for seamless steel pipe includes annular heating furnace, conical punching machine, new Assel pipe mill, online heat treatment furnace, 14 sets of three roll micro tension sizing mill, six roll straightening machine, fixed-length pipe cutting machine, inspection, etc.
  • Thermal Treatment
  • We own two heat treatment production lines for seamless tubes. According to different performance and specifications requirements, we can provide special thermal treatment processing methods to ensure special performance requirements of seamless steel pipe for chemical engineering. The big thermal treatment line deals with pipes with the length of less than 13.5 m (φ114 mm to φ406 mm). The annual output is 150,000 tons. This production line for seamless tube has three process routes including quenching and tempering, normalizing, normalizing and tempering. While the small heat treatment line can process seamless steel pipes with the length of less than 12.5 m (φ57 mm to φ180 mm). The annual output is 50,000 tons. This production line has two process routes including quenching and tempering and normalizing.
  • Quality Inspection
  • In order to guarantee the quality of our seamless tubes, JST configures ultrasonic inspection machine, hydrostatic press, imported joint inspection machine, portable spectrum analyzer, desktop spectrum analyzer, magnetic particle inspection machine, complete mechanical property testing equipment, complete microstructure analysis equipment, a full set of API standard gauge and non-standard gauge for seamless oil pipes. We also train a number of operators and inspectors for operating and inspecting seamless steel pipes.
  • Employee Training
  • To enhance the overall quality of staff, JST has relevant trainings each month. Every year, we also invite professionals to train our employees. Our seamless tubes are well received and highly appraised by customers both at home and abroad.
Processing Properties
  • Hydraulic Test
  • We should do hydraulic test for each seamless steel pipe. The maximum test pressure is 20 MPa. Standup pressure time or pressure stabilized time should be not less than 10 s. Under the test pressure, seamless tube leakage phenomenon will not occur. We can also choose eddy current testing magnetic flux leakage inspection to replace hydraulic test.
  • Flattening Test
  • Seamless steel pipes with the outside diameter of more than 22 mm to 400 mm should be carried out with flattening test (except 1Cr5Mo steel pipe). After flattening test, seamless tube sample should be free of cracks or gaps.
  • Flaring Test
  • According to the requirements of buyers and contracts, we do flaring tests for the seamless steel pipes with the wall thickness of not more than 8 mm. This test is carried out at room temperature. The top center taper is 30 °, 45 ° or 60 °. After flaring test, seamless tube sample should be free of cracks or gaps.
Parameters

Mechanical Properties of Seamless Steel Pipe for Chemical Engineering

Grade Tensile Strength (Mpa) Yield Point (Mpa) Elongation (%) Impact Force (J)
10 335-490 ≥  205 ≥ 24  -
20 410-550 ≥ 245 ≥ 24 ≥ 39
16Mn 490-670 ≥ 320 ≥ 21 ≥ 47
15MnV 510-690 ≥ 350 ≥ 19 ≥ 47
12CrMo 410-560 ≥ 205 ≥ 21 ≥ 55
15CrMo 440-640 ≥ 235 ≥ 21 ≥ 47
12Cr2Mo 450-600 ≥ 280 ≥ 20 ≥ 38
10MoWVNb 470-670 ≥ 295 ≥ 19 ≥ 62
1Cr5Mo 390-590 ≥ 195 ≥ 22 ≥ 94
12SiMoVNb ≥ 470 ≥ 315 ≥ 19 ≥ 47

Note:
1. When we use 12CrMo steel to produce seamless tubes (The outside diameter is not more than 30 mm and the wall thickness is more than 3 mm.), the yield point is allowed to reduce 10 MPa. For other grades of seamless steel pipes (the wall thickness is 16 mm to 40 mm), the yield point is also allowed to reduce 10 MPa.
2. We can provide seamless tubes with the outside diameter of 8 mm to 340 mm and the wall thickness of 1mm to 60 mm.

Founded in 1984, Jiangyin Changjiang Steel Tube Making Factory is a professional manufacturer of seamless steel pipes for chemical engineering. Our products also cover casing, tubing or oil pipe, line pipe, drill pipe, high pressure boiler pipe, marine pipe, cylinder tube, hydraulic prop tube, fluid pipe, structure pipe, etc. They have passed API 5CT, API 5L, API 5DP, CCS, LR, DNV, ABS, NK, BV, GL, PED, SGS, ISO9001:2000 and ISO14001:2004 certifications. Our seamless tubes have won widespread praise and recognition by customers.

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