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| Categories | Stainless Steel Welded Tube |
|---|---|
| Brand Name: | YUHONG |
| Model Number: | ASTM A249 TP304 Stainless Steel BA Welded Tube |
| Certification: | ABS, LR, GL, DNV, NK, TS, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Place of Origin: | CHINA |
| MOQ: | 500kgs |
| Payment Terms: | L/C, T/T |
| Delivery Time: | 7 DAYS |
| Packaging Details: | Ply-wooden Case /Iron Case/ Bundle with plastic Cap |
| Product Name: | Stainless Steel Welded Tube |
| Standard: | ASTM A249 / ASME SA249 |
| Size: | 6.35mm (1/4"), 9.52mm (3/8"), 12.7mm(1/2"), 15.88mm (5/8"), 19.05mm(3/4"), 25.4mm (1"), 31.75mm(1-1/4"), 38.1mm (1-1/2"), 44.45mm(1-3/4"), 50.8mm(2"), 63.5mm(2-1/2"), 76.2mm(3"), 101.6mm (4") |
| Material Grade: | TP304, TP304L , TP304H, TP309, TP310S, TP310H, TP316, TP316L, TP316Ti，TP316H, TP317, TP317L, TP321, TP321H, TP347, TP347H, TP904L |
| Surface: | Bright Annealed (BA), Pickled And Annlealed , Polished |
| Form: | Straight & U Bend & Coil |
| NDT: | ET, HT, PT |
| TPI: | BV, SGS, LR, ABS, DNV, GL , MOODY, IBR, APS, V-TRUST,CCIC |
| Application: | boiler, super heater, heat exchanger and condenser |
| High Light: | ASTM A249 Stainless Welded Tube, ASME SA249 Stainless Welded Tube, BA Stainless Welded Tube |
| Company Info. |
| Yuhong Group Co.,Ltd |
| Verified Supplier |
| View Contact Details |
| Product List |
ASTM A249 TP304 Bright Annealed Stainless Steel Welded Tube for Superheater
Bright annealing tube under a reducing atmosphere or in a vacuum protection, after high
temperature solid melting and rapid cooling to get the stainless
steel tube, requiring the inner surface has a very good surface
roughness and cleanliness, is a comprehensive consideration of
organizational stability corrosion resistance and workability of
the pipe.
ASTM A249 TP304 Stainless Steel Tube Specifications
Difference Between Seamless And Welded Tube & Pipe
Seamless and welded are mainly two types stainless steel tube & stainless steel pipe, there is a debate whether seamless is better than welded for a long time. Although with improved metallurgy and welding processes in welded tubes, the arguments typically focus on structural integrity and corrosion resistance in weld area.
ASTM A249 TP304 Chemical Composition
| Grade | C | Si | Mn | Cr | Ni | S | P | Fe |
| TP304 | 0,08 | 1,0 | 2 | 18 – 20 | 8 – 11 | 0,03 | 0,045 | Bal. |
ASTM A249 TP304 Mechanical Properties
| Grade | Tensile Strength (Mpa) | Yield Point (Mpa) | Elongation (%) |
| TP304 | 515 | 205 | 35 |
Dimensional Tolerences
all dimensions in inches (mm)
| Size OD | Nominal Wall | Outside Diameter | Length | Wall |
| 1/2" (12.7) | 0.065" (1.65)/0.049" (1.25) | +/-0.005 (0.13) | +1/8" (3.18) - 0 | +/-10.0% |
| 3/4" (19.1) | 0.065" (1.65)/0.049" (1.25) | +/-0.005 (0.13) | +1/8" (3.18) - 0 | +/-10.0% |
| 1" (25.4) | 0.065" (1.65)/0.049" (1.25) | +/-0.005 (0.13) | +1/8" (3.18) - 0 | +/-10.0% |
| 1-1/2" (38.1) | 0.065" (1.65)/0.049" (1.25) | +/-0.008" (0.20) | +1/8" (3.18) - 0 | +/-10.0% |
| 2" (50.8) | 0.065" (1.65)/0.049" (1.25) | +/-0.008" (0.20) | +1/8" (3.18) - 0 | +/-10.0% |
| 2-1/2" (63.5) | 0.065" (1.65) | +/-0.010" (0.25) | +1/8" (3.18) - 0 | +/-10.0% |
| 3" (76.2) | 0.065" (1.65) | +/-0.010" (0.25) | +1/8" (3.18) - 0 | +/-10.0% |
| 4" (101.6) | 0.083" (2.11) | +/-0.015" (0.38) | +1/8" (3.18) - 0 | +/-10.0% |
| 6" (152.4) | 0.083" (2.11) | +/-0.030" (0.76) | +1" (25.4) - 0 | +/-10.0% |
| 6" (152.4) | 0.109" (2.77) | +/-0.030" (0.76) | +1" (25.4) - 0 | +/-10.0% |
| 8" (203.2) | 0.109" (2.77) | +0.061" (1.55)/-0.031" (0.79) | +1" (25.4) - 0 | +/-10.0% |
Cold Working
After welding, inside and outside of tube most be forged to achieve
high integrity, then have a correct properties, and also possess
precise dimensions.
Heat Treatment
Annealing is a very important process, tubes are heated to required
solution temperature and rapidly cooling, ASTM A249 TP304 stainless
steel requires minimum solution temperature is 1040 degree, it can
restabilize microstructure to ensure premium properties.
Bright Annealing Option
Bright annealing welded tube is often required, tube pass through
in closed furnace, inserting hydrogen gas to isolate surrounding
atmosphere, finally forming a passive oxide film on the surface.
Quality Control System
Tube analysis shall conform to the requirements as to chemical
composition specified on ASTM A249 TP304 grade, usually we use PMI
method to identify the material.
Nondestructive Testing
In practice, eddy current tests perform well in the most case, to
detect tube imperfection. Each tube is inspected by ECT.
Dimensional Inspection
All the tubes should be meet to requirements of ASTM A249
specification, including tolerance of the tube outside diameter
(OD), wall thickness, and length, minimum wall thickness tube is
available.
Applications
Bright annealed stainless steel welded pipe is widely used in making military products, semiconductor, biological medicine, precision instruments and meters, hydraulic parts and many other industrial products.
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