Pipe & Tube for Chemical Industry

1. Austenitic Stainless Steel

 Austenitic stainless steel is used widely for various usages in general corrosion environment.

Austenitic

Grade Chemical Composition Applicable
Standard
(ASTM/ASME)		 EN, etc. Characteristics Example of applications
304 18Cr-8Ni S30400 1.4301 Basic stainless steel grade General purpose for numerous applications
304H 18Cr-8Ni
-High C		 S30409 1.4948 Basic stainless steel grade General purpose for numerous applications
304L 18Cr-8Ni
-Low C		 S30403 1.4307 Intergranular corroison resistance General purpose for numerous applications
304N 18Cr-8Ni-N S30451 1.4315 High Strength  
304LN 18Cr-8Ni
-Low C-N		 S30453 1.4311 Intergranular corroison resistance, high strength  
309H 22Cr-12Ni S30909 1.4829 Oxidation resistance Radiant tubes
309S 22Cr-12Ni S30908   Oxidation resistance Radiant tubes
310H 25Cr-20Ni S31009 1.4842 Oxidation resistancece Radiant tubes, boiler heater tubes
310S 25Cr-20Ni S31008   Oxidation resistancece Radiant tubes, boiler heater tubes
316 18Cr-12Ni
-2Mo		 S31600 1.4401 Corrosion resistance LNG plant pipes, boilers and chemical industry tubes and pipes 
316H 18Cr-12Ni
-2Mo-High C		 S31609 1.4918 Corrosion resistance LNG plant pipes, boilers and chemical industry tubes and pipes 
316L 18Cr-12Ni
-2Mo-Low C		 S31603 1.4404 Corrosion resistance LNG plant pipes, boilers and chemical industry tubes and pipes 
316Ti 18Cr-12Ni
-Mo-Ti		 S31635 1.4571 Intergranular corrosion resistance  
317 18Cr-12Ni
-3Mo		 S31700   Pitting corrosion resistance Chemical tanler pipes
317L 18Cr-12Ni
-3Mo-Low C		 S31703 1.4438 Pitting corrosion resistance Chemical tanler pipes
NEXAGE™
317CU		 18Cr-16Ni
-3.5Mo-4Cu		 S31730   Sulfuric and hydrochloric acid
dew point corrosion resistance		 Exhaust gas pipes and heat exchanger tubes for sulfur fuel and boimass boilers 
NEXAGE™
317AP		 17Cr-14Ni
-3Mo-0.3Nb-N		 S31740
(ASME CC3038)		  

- PTA-SCC,
　weld crack
   and SR crack
　resistance​​​​​

- Naphthenic acid
  corrosion
  resistance

 Petroleum refining plant furnace tubes
321 18Cr-9Ni
-Ti		 S32100 1.4541 Intergranular corrosion resistance Chemical plant pipes
321H 18Cr-9Ni
-Ti-High C		 S32109 1.4940 High-temperature strength Boiler heater and reheater tubes
347 18Cr-9Ni
-Nb		 S34700 1.4550 Intergranular corrosion resistance Chemical plant pipes and tubes
347H 18Cr-9Ni
-Nb-High C		 S34709 1.4942 High-temperature strength Boiler heater and reheater tubes
347AP 18Cr-10Ni
-0.3Nb
-Extra low C		 S34751  

PTA-SCC,
weld crack
and SR crack
resistance​​​​​

 Petroleum refining plant furnace tubes
NEXAGE™
347AlPha		 18Cr-11Ni
-3Cu-Mo
-Nb-B-N
-Extra low C		 S34752
(ASME CC2984)		  

- PTA-SCC,
   weld crack
   and SR crack
   resistance​​​​​
- High-temperature
　strength

 Petroleum refining plant furnace tubes
YUS™270 20Cr-18Ni
-6Mo-0.7Cu
-0.2N-Low C		 S31254 1.4547 High pitting corrosion resistance
  • Seawater heat exchanger tubes
  • Food plant pipes handling high salinity
254SMO 20Cr-18Ni
-6Mo-Cu-N		 S31254 1.4547 High pitting corrosion resistance Seawater heat exchanger tubes
HYDREXEL™ 22Cr-13Ni
-5Mn-2Mo
-0.3N		 TPXM-19   Hydrogen embrittlement resistance and high strength High pressure gaseous hydrogen
supply tubes for hydrogen stations
HYDLIQUID™ 22Cr-13Ni
-5Mn-2Mo
-0.3N-Nb-V		 TPXM-19   Hydrogen embrittlement resistance
and high cryogenic toughness		 Liquefied hydrogen, LNG plant pipes
310MoLN 25Cr-22Ni
-2Mo-N		 S31050 1.4466 Intergranular corrosion resistance Urea reactor tubes

 

2. Ferritic, Martensitic Stainless Steel

Ferritic Stainless Steel has higher Stress Corrosion Cracking  resistance than Type 304, widely used for heat exchanger tubes.

Ferritic, Martensitic Stainless Steel

Grade Chemical Composition

Applicable
Standard
(ASTM/ASME)

 EN, etc. Characteristics Example of applicatoins
430 18Cr S43000 1.4016 Chloride corrosion and SCC resistance Water heater pipes
444 19Cr-2Mo-Ti/Nb S44400 1.4521 Chloride corrosion and SCC resistance Water heater pipes
YUS™190

19Cr-2Mo
-Ti-Nb
-Extra Low C
-Low N

 S44400 1.4521

- SCC resistance
- General corroison
   resistance
   at SUS304
   or higher

- Heat exchanger for various chemical plants
- Small hot-water/steam boilers
446 25Cr-N S44600   Chloride corrosion and SCC resistance Water heater pipes

 

3. Duplex Stainless Steel

 Duplex stainless steel has higher strength, corrosion resistance (pitting ) than conventional austenitic stainless steels.
Duplex

Grade Chemical Composition

Applicable
Standard
(ASTM/ASME)

 EN, etc. Characteristics Example of applications
YUS™2120 21Cr-2Ni
-3Mn-Cu-N		   JIS G3459
SUS821L1TP		 SCC, crevice corrosion resistance Heat exchanger for various chemical plants
YUS™2351 23Cr-5Ni
-1Mo		   JIS G3459
SUS329J1TP		 SCC, crevice corrosion resistance Heat exchanger for various chemical plants
329J3L 22Cr-5Ni
-3Mo-0.15N		 S31803 1.4462
NORSOK
M-630/M-650

High strength
and high corrosion resistance

 Various heat exchanger tubes
DP11A 24Cr-4Ni
-Mo-Cu-N		     SCC, crevice corrosion resistance Heat exchanger for various chemical plants
329J4L 25Cr-7Ni
-3Mo-0.2N		 S31260   High strength
and high corrosion resistance		 Various heat exchanger tubes
S31500 18.5Cr-5Ni
-2.7Mo		 S31500   High strength
and high corrosion resistance		 Various heat exchanger tubes
S32205 22.5Cr-6Ni
-3Mo-0.2N		 S32205 1.4462
NORSOK
M-630/M-650		 High strength
and high corrosion resistance		 Various heat exchanger tubes
S32750 25Cr-7Ni
-4Mo-0.3N		 S32750 1.4410
NORSOK
M-630/M-650		 High strength
and high corrosion resistance		 Seawater desalination plant pipes
DP12 25Cr-7Ni
-2.7Mo-W-N		 S31260   Urea corrosion and SCC resistance Urea reactor tubes
DP3
DP3N		 25Cr-7Ni
-3.3Mo-W-N		 S31260   Pitting corrosion, seawater
and crevice corrosion resistance		 Seawater heat exchanger tubes for various chemical plants
DP3W 25Cr-7Ni
-3.2Mo-2W-N		 S39274
ASME CC2427		 NORSOK
M-630/M-650		 Pitting corrosion, seawater
and crevice corrosion resistance		 Umbilical tubes and seawater heat exchanger tubes
DP28W™ 27.5Cr-7.7Ni
-2.2W-Mo-N		 S32808
ASME CC2496		   Urea corrosion and SCC resistance) Urea reactor tubes

 

4. High-Ni, Ni-based Alloy

  •  High-Ni alloy like Alloy 825 has higher corrosion and strength in high temperature.
  • Ni-based alloy is applied to pipes and tubes for chemical plants where corrosion is particularly severe.

High Ni, Ni-based alloy Selection Flow

Grade Chemical Composition Applicable
Standard
(ASTM/ASME)		 EN, etc. Characteristics Example of applications
800 20Cr-30Ni
-Ti		 N08800 1.4558 High corrosion resistance  
800H 20Cr-30Ni
-Ti-High C		 N08810 1.4876 High strength, high corrosion resistance Chemical plant heater and reheater tubes
904L 20Cr-25Ni
-4.5Mo-Cu		 N08904 1.4539 High corrosion resistance Various heat exchanger tubes
28 27Cr-31Ni
-3.5Mo-Cu		 N08028 1.4563 High corrosion resistance Various heat exchanger tubes
20 20Cr-35Ni
-2Mo-3Cu
-Nb		 N08020 2.4660 High corrosion resistance  
825 20Cr-42Ni
-3Mo-2Cu
-Ti		 N08825 2.4858 High corrosion resistance and SCC resistanece Heat exchanger tubes fo petroleum refining
NEXAGE™
HR24		 25Cr-38Ni
-Mo-Si		     Oxidation, carburization resistance
and high temperature strength
(700 to 1100 deg. C)		 Cracking tubes for ethylene plants
NEXAGE™
845

22.5Cr-47Ni
-3Cu-6Mo
-3.5W

 N06845
(ASME CC2794)		   Pitting corrosion 
and acid resistance (sulfuric acid, hydrochliric
acid, nitric acid, fomic acid etc.)		 Highly corrosion resistant pipes nad heat exchanger tubes
for chemical industry
600 15Cr-8Fe
-Ni base		 N06600 2.4816 Oxidation resistance Thermocouple protection tubes
601 23Cr-1.4Al
-Ni base		 N06601 2.4581 Oxidation and carburization resistance  
625 22Cr-9Mo
-Ni base		 N06625 2.4856 High corrosion resistance and SCC resistance  
NEXAGE™
696		 30Cr-60Ni
-2Cu-1.5Si		 N06696
(ASME CC2652)		   Metal dusting, caburization resistance
and high-temperature strength

- Heating furnace pipes for synthetic gas plants
- High- temperature pipes for direct reduction iron plants
C22 21Cr-13Mo
-3W-Ni base		 N06022 2.4602 High acid resistance Heat exchanger tubes for chemical plants
276 15.5Cr-16Mo
-5Fe-Ni base		 N10276 2.4819 High acid resistance Heat exchanger tubes for chemical plants
200 Ni (Annealed) N02200 2.4066 High corrosion resistance Heat exchanger tubes for caustic soda and hydrogen chloride plants
201 Ni-Low C N02201 2.4068 High corrosion resistance Heat exchanger tubes for caustic soda and hydrogen chloride plants
NEXAGE™
201		 Ni-Low C-Nb N02201 2.4068 High strength (Easy handling) Heat exchanger tubes for caustic soda and hydrogen chloride plants