ASTM A269 Small Diameter Straight Tube , Heat Exchanger Tube , Annealing & Pickling
ASTM A 213 / A 213M ASME SA213 / SA213M Specification for Seamless Ferric and Austenitic Alloy -Steel Boiler , Su[perheater , and Heat-Exchanger Tubes
ASTM A 249 / A 249M Specification for Welded Austenitic Steel Boiler , Superheater , Heat-Exchanger , and Condenser tubes
Austenitic:
TP310S(0Cr25Ni20, 2520)
TP304(0Cr18Ni9)
904L (00Cr20Ni25Mo4.5Cu , UNS N08904)
TP347(0Cr18Ni11Nb)
TP347H(1Cr19Ni11Nb)
TP321(0Cr18Ni10Ti)
TP304L(00Cr19Ni10)
TP316(0Cr17Ni12Mo2)
TP316L(00Cr17Ni14Mo2)
Duplex :
UNS S31803 (00Cr22Ni5Mo3N SAF2205)
UNS S32750 (00Cr25Ni7Mo4N SAF 2507)
Process : |
1 . We use Cold Drawn techonology to produce U bend tube |
2 . U bend tubes produce will accordance to customer's drawings |
3 . To avoid oxidation , inert gas (Argon) is passed through tubes ID at the required flow rate |
4 . The radius is checked for its OD and wall thinning with the recommended specification |
5 . We'll choose three different position or as customer's require to make sure tubes quality . We'll do physical properties and micro-structure test |
6 . Visual inspection for waviness and cracks is done with Dye Penetrant Test |
7 . Each tube is then hydro tested at the recommended pressure to check for leakage |
MTSCO heat exchanger tube with pickling and annealing surface is very popular in boilers and heat exchangers industry , water heater industry , air-conditioning industry etc . This kind of seamless tubes are have a very important position in our all products .