Specifications
Zhongrui manufactures stainless steel tubes&pipes to different specifications for customers with different demands and from different regions..
ASTM-Specification
Stainless Steel pipes, tubes and fittings
A 213 / A 213M : Seamless ferritic and austenitic alloy steel boiler, superheater and heat exchanger tubes
A 269 / A 269M : Seamless and welded austenitic stainless steel tubing for general service
A 312 / A 312M : Seamless and welded austenitic stainless steel pipes
A 376 / A 376M : Seamless austenitic steel pipe for high-temperature central-station service
A 511 : Seamless stainless steel mechanical tubing
A 789 / A 789M : Seamless and welded ferritic-austenitic stainless steel tubing for general service
A 790 / A 790M : Seamless and welded ferritic-austenitic stainless steel pipe
ASME-Specification
ASME pressure Code Stainless Steel
SA 213 / SA 213M : Seamless ferritic and austenitic alloy steel boiler, superheater and heat exchanger tubes
SA 269 / SA 269M : Seamless and welded austenitic stainless steel tubing for general service
SA 312 / SA 312M : Seamless and welded austenitic stainless steel pipes
SA 376 / SA 376M : Seamless austenitic steel pipe for high-temperature central-station service
SA 511 : Seamless stainless steel mechanical tubing
SA 789 / SA 789M : Seamless and welded ferritic-austenitic stainless steel tubing for general service
SA 790 / SA 790M : Seamless and welded ferritic-austenitic stainless steel pipe
European-Specifications
Stainless steels
EN 10216-5 : Seamless steel tubes for pressure purposes
EN ISO 1127 : Seamless stainless steel tubes (Dimensions and weights)
GOST-Specification
Stainless steels
GOST 9941 : Seamless stainless steel tubes, cold and hot finished
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Zhongrui raw materials used in productions are from the most reliable steel mills.
Austenitic Stainless Steels
This type of grades covers the biggest part of Stainless Steel grades. What defines this grades is a chromnium percentaje over 15% They are resistant to different types of corrosion caused by chemical influences. One specific type of Austenitic Stainless Steel grades are the Heatresistant stainless steel grades which maintain their mechanical properties when exposed to elevated temperatures.
Duplex-Superduplex
Austenitic-ferritic stainless steels(duplex steels) are characterised by comparatively lower presence of nickel compared to standard austenitic grades. Their main feature are the mechanical qualities, particularly their high stress corrosion cracking resistance. They are especially suitable for off shore applications and in the chemical industry.
Austenitic Stainless Steel | ||
UNS | ASTM | EN no. |
S30400/S30403 | 304/304L | 1.4301/1.4307 |
S31603 | 316L | 1.4404 |
S31635 | 316Ti | 1.4571 |
S32100 | 321 | 1.4541 |
S34700 | 347 | 1.4550 |
S31008 | 310S | 1.4845 |
N08904 | 904L | 1.4539 |
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