Spezilla Tube Co., Ltd. (Shanghai)
Spezilla Tube Co., Ltd. Excellence in Stainless Steel Tubing
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ASME SA213 Seamless Nickel Alloy Pipe ss heat exchanger Bright Annealing Smooth Surface
Spezilla’s dedicated U-Bend production facility incorporates an environmentally friendly bright annealing process. Our low oxidation, acid-free process complies with ASTM/ASME 688 and 803 Feedwater Heater specifications.
| Stainless Steel | 304/304L/304LN/ 304H/304N 316/316L/316H 317/317L 309S/309H 310S/310H 321/321H 347/347H |
| Duplex Stainless Steel | Duplex 2205 Lean Duplex 2003 Lean Duplex 2101 Lean Duplex 2304 Super Duplex 100 Super Duplex 2507 |
| Super Austenitic | 6-Moly 6XN 6-Moly 254 825 904L |
| Super Ferritics/Ferritics | S44627 439 446 |
Dimensional tolerances U-tubes acc. to TEMA R.C.B.
Length of straight part -0/+5 mm
Flattening (also called “ovality”) at the bend shall not exceed 10% of the nominal tube outside diameter.
Wall thickness in bending part acc. to TEMA RCB 2.31 Minimum tube wall thickness in the bend part (T min)T(min) ≥ (SW × (2×R + D))/( 2× (R+D)where:
SW is smallest wall thickness D Nominal outside diameter R radius
Radius tolerance 1) for R 100 mm +/- 3 mm
2) for R ≥ 100 mm +/- 5 mm
Straightness tolerance max. 1,5 mm per 1 m
U-Tube ends: plain, vertically cut to the tube axis
Tube-bending line, installed at 2007, will allow to produce U-tubes as per such standards:
1. ASTM A688/A688M-08
2. ASTM A803/A803M
3. ASTM A556/A556M, ASME SA556
4. ASME SA-688
5. ASME SA213 ASTM A213
Initial Length
Maximum lengths of 27000mm can be supplied on request
Dimensions:
Tubes OD in mm can be bent upon agreement: 15,8 - 16,0 - 17,0 - 18,0 - 19,05 - 20,0 - 21,3 - 25,4 -26,7 - 31,8 -38,1
Bending radius:
Minimum: 1.5×OD
Maximum: 1500 mm
Advantages of Spezilla’s unique Direct-to-Bend manufacturing:
Repeatable and predictable tube quality
Improved ease of tube fit and heater assembly
Fast delivery
Increased efficiencies
Minimized in-process material handling
Lower than 5,000 psi residual
stress for SCC susceptible alloys
Spezilla’s U-Bend Tubing is used in Heat Exchanger applications in the following industries:
Power Generation
Chemical
Petrochemical
Food
ASME SA213/A213: Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Super heater and Stainless Steel Heat Exchanger Tubes.
ASTM A249 / A249M: Standard Specification for Welded Austenitic Steel Boiler, super heater Heat-Exchanger, and Condenser Tubes.
Other Standard: DIN 17456, DIN 17458, EN10216-5, GOST 9940-81, GOST 9941-81, JIS-G3463,
Material Grade:
Final Finishing
Solution Annealed & Pickled/Bright Annealed.
Type of Tubes:
U-bend
