Steel pipes used for chemical equipment are typically made from carbon steel or alloy steel.
Implement GB 9948, GB 6479 for seamless steel tube & pipe used for pressure pipes such as petroleum and chemical furnaces, refineries, crackers, hydrogen units, heat exchangers etc. Carbon steel pipes are commonly used for general-purpose applications, while alloy steel pipes offer enhanced corrosion resistance and higher strength for more demanding environments.
Steel pipes for chemical equipment are manufactured according to various standards and specifications to ensure their quality and performance. These standards may include ASTM, DIN, or specific industry standards for chemical processing equipment.
| Usage | Steel Grade | Specification |
| Pipe used for Petroleum Cracking | 20, 12CrMo, 15CrMo, 12Cr2Mo, 12Cr1MoV, | GB 9948 |
| 12Cr5MoI, 12Cr5MoNT, 12Cr9MoI, 12Cr9MoNT, | ||
| Pipe used for High Pressure | 20, Q345B, Q345C, Q345D, Q345E, 12CrMo, | GB 6479 |
| Chemical Fertilizer Equipment | 15CrMo, 12Cr2Mo, 12Cr5Mo, 10MoWVNb |
| Gade | tensile strength (MPa) | yield strength (MPa) | elongation (%) | impact energy (J) | Brinell hardness (HB) | delivery status |
| 10 | 330-490 | ≥205 | ≥24 | / | / | Normalizing |
| 20 | 410-550 | ≥245 | ≥21 | ≥39 | / | Normalizing |
| 15CrMo | 440-640 | ≥235 | ≥21 | ≥47 | ≤170 | Normalizing + tempering |
| 1Cr2Mo | ≥390 | ≥175 | ≥22 | ≥92 | ≤179 | Normalizing + tempering |
| 1Cr5Mo | ≥390 | ≥195 | ≥22 | ≥92 | ≤187 | annealing |
| Gade | C | Si | Mn | P | S | Cr | Mo | Ni |
| 10 | 0.07-0.14 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | ≤0.15 | / | ≤0.25 |
| 20 | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | ≤0.25 | / | ≤0.25 |
| 15CrMo | 0.12-0.18 | 0.17-0.37 | 0.40-0.70 | ≤0.035 | ≤0.035 | 0.80-1.10 | 0.40-0.55 | ≤0.30 |
| 1Cr2Mo | ≤0.15 | 0.50-1.00 | 0.30-0.60 | ≤0.035 | ≤0.030 | 2.15-2.85 | 0.45-0.65 | / |
| 1Cr5Mo | ≤0.15 | ≤0.50 | ≤0.60 | ≤0.035 | ≤0.030 | 4.00-6.00 | 0.45-0.60 | ≤0.60 |
General GB 9948 seamless steel pipe use temperature below 450 ° C, domestic pipe is mainly made of 10, 20 carbon steel hot-rolled pipe or cold drawn pipe.
| Grade | C | Si | Mn | Cr | Mo | V | W | Nb | Ni | P S(No More Than) | |
| 10 | 0. 07-0. 13 | 0. 17 -0. 37 | 0.35 -0. 65 | - | - | - | - | - | - | 0.025 | 0.015 |
| 20 | 0. 17 -0. 23 | 0.17 -0. 37 | 0. 35-0.65 | - | - | - | - | - | - | 0.025 | 0.015 |
| Q345Ba | 0. 12 -0. 20 | 0.20-0. 50 | 1.20-1.70 | <0. 30 | <0. 10 | Mis | - | <0.07 | W0. 50 | 0.025 | 0.015 |
| Q345C" | 0. 12 -0. 20 | 0.20 -0. 50 | 1.20 -1. 70 | W0. 30 | <0. 10 | <0. 15 | - | W0.07 | <0. 50 | 0.025 | 0.015 |
| Q345D" | 0. 12 -0. 18 | 0.20 -0. 50 | 1. 20-1.70 | W0. 30 | <0. 10 | <0. 15 | - | W0.07 | <0. 50 | 0. 025 | 0.015 |
| Q345Ea*B | 0. 12 -0. 18 | 0. 20-0. 50 | 1. 20 -1.70 | W0. 30 | <0. 10 | <0. 15 | - | <0.07 | <0. 50 | 0. 025 | 0.01 |
| 12CrMo | 0. 08-0. 15 | 0.17 -0. 37 | 0. 40-0. 70 | 0. 40-0. 70 | 0. 40-0. 55 | - | - | - | - | 0. 025 | 0.015 |
| 15CrMo | 0. 12 -0. 18 | 0. 17 -0. 37 | 0. 40-0. 70 | 0. 80-1. 10 | 0. 40-0.55 | - | - | - | - | 0. 025 | 0. 015 |
| 12Cr2Mo | 0. 08-0. 15 | <0. 50 | 0. 40-0.6 | 2.00-2. 50 | 0. 90-1. 13 | - | - | - | - | 0.025 | 0. 015 |
| 12Cr5Mo | <0. 15 | <0.50 | <0. 60 | 4. 00-6.00 | 0. 40-0. 60 | - | - | - | <0. 60 | 0. 025 | 0. 015 |
| LOMoWVNb | 0. 07-0. 13 | 0. 50-0.8 | 0. 50-0.8 | - | 0. 60-0. 90 | 0. 30-0. 50 | 0. 50-0. 90 | 0. 06-0. 12 | - | 0.025 | 0.015 |
| 12SiMoVNb | 0.08 -0. 14 | 0.50 -0.8 | 0. 60-0. 90 | - | 0. 90-1. 10 | 0. 30-0. 50 | - | 0. 04-0.08 | - | 0.025 | 0.015 |
Awhen It Is Necessary To Add Fine Grain Elements, The Steel Shall Contain At Least One Of Al, Nb, V And Ti. The Added Fine Grain Elements Shall Be Indicated In The Quality Certificate. Ti Content Shall Not Be More Than 0.20%
BAl Content In Steel Shall Not Be Less Than 0.020%, Or Ala Content In Steel Shall Not Be Less Than 0.015%
| Mechanical Property | ||||||||||
| Grade | Tensile (MPa) | Yield (MPa) | Elong After Fracture A/% | Reduction Of Area (Z/%) | Shork Absorption Energy （KV2）/J |
|||||
| Steel Tube Wall Thickness/Mm | Test Temperature/℃ | Portrait | Transver | |||||||
| W16 | >16 — 40 | >40 | Portrait | Transver | ||||||
| Not Less Than | Not Less Than | |||||||||
| 10 | 335-490 | 205 | 195 | 185 | 24 | 22 | 一 | 一 | — | 一 |
| 20 | 410-550 | 245 | 235 | 225 | 24 | 22 | 一 | 0 | 40 | 27 |
| Q345B | 490-670 | 345 | 335 | 325 | 21 | 19 | 一 | 20 | 40 | 27 |
| Q345C | 490-670 | 345 | 335 | 325 | 21 | 19 | 一 | 0 | 40 | 27 |
| Q345D | 490-670 | 345 | 335 | 325 | 21 | 19 | 一 | -20 | 40 | 27 |
| Q345E | 490-670 | 345 | 335 | 325 | 21 | 19 | — | -40 | 40 | 27 |
| 12CrMo | 410-560 | 205 | 195 | 185 | 21 | 19 | — | 20 | 40 | 27 |
| 15CrMo | 440-640 | 295 | 285 | 275 | 21 | 19 | 一 | 20 | 40 | 27 |
| 12Cr2Moa | 450-600 | 280 | 20 | 18 | 一 | 20 | 40 | 27 | ||
| 12Cr5Mo | 390-590 | 195 | 185 | 175 | 22 | 20 | 一 | 20 | 40 | 27 |
| LOMoWVNb | 470-670 | 295 | 285 | 275 | 19 | 17 | 一 | 20 | 40 | 27 |
| 12SiMoVNb | 2470 | 315 | 305 | 295 | 19 | 17 | 50 | 20 | 40 | 27 |
Stainless steel and Ni-based alloy pipes and tubes have superior corrosion resistance, heat resis-tance, and low-temperature properties, and have been used as raw materials that can withstand harsh environments as seen in petroleum refining, petroleum chemistry, and energy fields, such as power and gas. Recently, they have proliferated in fields for building construction applications with their high aesthetic quality advantages, as well as in fields of new demand including semiconductor and liquid-crystal manufacturing equipment appli-cations requiring a high level of cleanliness.
Our stainless steel and Ni-based alloy pipes and tubes have been manufactured based on excel-lent technology and strict quality control, from raw materials to final products, and have gained a favorable reputation from various fields. Without remaining complacent with the status quo, we will continue to research and develop improved products and will strive to meet the demands of the industry — which is undergoing remarkable technological innovation — and so we hope you will continue to do business with us.
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.
Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.
The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.
Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.
