China Stainless Steel
Welded Pipe & Tube
As a leading Chinese stainless steel pipe & tube supplier, CIVMATS produces welded stainless steel pipe & tube in different shapes.
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- CIVMATS
- Stainless Steel Pipe & Tube
- Welded Pipe & Tube
Description
CIVMATS produces welded stainless steel pipe & tube in different shapes: round, square and rectangle. In comparison with seamless pipe & tube, the lead time for stainless steel welded time is way shorter. For common welded pipes & tubes, whether common in grades (304, 304L, 316, 316L )or common in dimensions (SCH5S, SCH10S, SCH40, SCH80), we have huge stocks for your choices. It can take a week for port delivery. Other grades than the above mentioned such as 304H, 316H, 316Ti, 309S, 310S, 317L, 347, 321, duplex and nickel alloy, it can take longer time roughly two to three weeks to finish production. Have to mention, the above mentioned lead time is estimated as per our manufacturing experience. For accurate feedback, we encourage your confirmation with us to avoid discrepancy. In terms of quality control, our welded pipes & tubes are subjected to X-ray inspection, Hrdro inspection, PMI inspection and others upon your request. The production capacity of stainless steel welded pipe & tube amounts to 1200 tons monthly.
Specifications
- • Outer Diameter: Φ6-Φ3000mm (Minimum - Maximum)
- • Wall Thickness: 0.3-45mm (Minimum – Maximum)
- • Length: 18000mm (Maximum)
- • *Customized size needs to be confirmed with us
Standards
- • American Standard: ASTM A312, ASTM A358, ASTM A249, ASTM A269, ASTM A554, ASTM A790, ASTM A268
- • European Standard: DIN 17457
- • Japanese Standard: JIS G3459
- • GB Standard: GB/T12770-2002, GB/T12771-2008
Features
- Anti-corrosion (the degree is susceptible to the alloys contained), heat-resistance, good cold and hot working properties, good toughness, good comprehensive performances and wide application.
Applications
- Industrial application such as petroleum, chemical, paper plant, sewage system, energy, dyeing workshop, mechanical and structural application, boiler heat exchange and others.
Manufacturing Process
Strip
Inspection
Analytic
Slitting
Auto-welding
Seam-grinding
Cut to Length
Degreasing
Annealing
Straightening
Pickling
Flat-end
X-ray Test
Hydro-statio Test
Pickling / Passivating
Inspection
Analytic
Marking
Packing & Shipping
Plate
Inspection of Size
Plasma-cutting
Edging
Bending
Seam-cleaning
Forming
Auto-welding
Degreasing
Annealing
Roundness Calibrating
Flat-end
X-ray Test
Hydro-statio Test
Pickling / Passivating
Inspection
Analytic
Marking
Packing & Shipping
Drawing & Formula
Formula: m = (OD - THK) × THK (mm) × L (m) × 0.02491
* For 316, 316L, 310S, 309S, etc., ratio=0.02507
OD = Outer diameter, THK = Wall Thickness, L = Length
Tolerence
| NPS Designator | Tolerance, % from Nominal | |
|---|---|---|
| Over | Under | |
| ⅛ to 2½ incl., all t/D ratios | 20.0 | 12.5 |
| 3 to 18 incl., t/D up to 5% incl. | 22.5 | 12.5 |
| 3 to 18 incl., t/D > 5% | 15.0 | 12.5 |
| 20 and larger, welded, all t/D ratios | 17.5 | 12.5 |
| 20 and larger, seamless, t/D up to 5% incl. | 22.5 | 12.5 |
| 20 and larger, seamless, t/D > 5% | 15.0 | 12.5 |
| Group | Size, Outside Diameter, in. | Permissible Variations in Outside Diameter, in. (mm) | Permissible Variations in Wall Thickness, % | Permissible Variations in Cut Length, in. (mm) | Thin Walled Tubes | |
|---|---|---|---|---|---|---|
| Over | Under | |||||
| 1 | Up to ½ | ±0.005(0.13) | ±15 | ⅛(3.2) | 0 | ... |
| 2 | ½ to 1½, excl | ±0.005(0.13) | ±10 | ⅛(3.2) | 0 | less than 0.065 in. (1.65 mm) nominal |
| 3 | 1½ to 3½, excl | ±0.010(0.25) | ±10 | 3/16(4.8) | 0 | less than 0.095 in. (2.41 mm) nominal |
| 4 | 3½ to 5½, excl | ±0.015(0.38) | ±10 | 3/16(4.8) | 0 | less than 0.150 in. (3.81 mm) nominal |
| 5 | 5½ to 8, excl | ±0.030(0.76) | ±10 | 3/16(4.8) | 0 | less than 0.150 in. (3.81 mm) nominal |
| 6 | 8 to 12, excl | ±0.040(1.01) | ±10 | 3/16(4.8) | 0 | less than 0.200 in. (5.08 mm) nominal |
| 7 | 12 to 14, excl | ±0.050(1.26) | ±10 | 3/16(4.8) | 0 | less than 0.220 in. (5.59 mm) nominal |
| OD Size, in. (mm) | Wall Thickness | OD, ± | ||
|---|---|---|---|---|
| in. | mm | in. | mm | |
| Under ½ (12.7) | 0.020 to 0.049 | 0.51 to 1.24 | 0.004 | 0.10 |
| ½ to 1 (12.7 to 25.4) | 0.020 to 0.065 | 0.51 to 1.65 | 0.005 | 0.13 |
| ½ to 1 (12.7 to 25.4) | over 0.065 to 0.134 | over 1.65 to 3.40 | 0.010 | 0.25 |
| Over 1 to 1½ (25.4 to 38.1), incl | 0.025 to 0.065 | 0.64 to 1.65 | 0.008 | 0.20 |
| Over 1 to 1½ (25.4 to 38.1), incl | over 0.065 to 0.134 | over 1.65 to 3.40 | 0.010 | 0.25 |
| Over 1½ to 2 (38.1 to 50.8), incl | 0.025 to 0.049 | 0.64 to 1.24 | 0.010 | 0.25 |
| Over 1½ to 2 (38.1 to 50.8), incl | over 0.049 to 0.083 | over 1.24 to 2.11 | 0.011 | 0.28 |
| Over 1½ to 2 (38.1 to 50.8), incl | over 0.083 to 0.149 | over 2.11 to 3.78 | 0.012 | 0.30 |
| Over 2 to 2½ (50.8 to 63.5), incl | 0.032 to 0.065 | 0.81 to 1.65 | 0.012 | 0.30 |
| Over 2 to 2½ (50.8 to 63.5), incl | over 0.065 to 0.109 | over 1.65 to 2.77 | 0.013 | 0.33 |
| Over 2 to 2½ (50.8 to 63.5), incl | over 0.109 to 0.165 | over 2.77 to 4.19 | 0.014 | 0.36 |
| Over 2½ to 3½ (63.5 to 88.9), incl | 0.032 to 0.165 | 0.81 to 4.19 | 0.014 | 0.36 |
| Over 2½ to 3½ (63.5 to 88.9), incl | over 0.165 | over 4.19 | 0.020 | 0.51 |
| Over 3½ to 5 (88.9 to 127.0), incl | 0.035 to 0.165 | 0.89 to 4.19 | 0.020 | 0.51 |
| Over 3½ to 5 (88.9 to 127.0), incl | over 0.165 | over 4.19 | 0.025 | 0.64 |
| Over 5 to 7½ (127.0 to 190.5), incl | 0.049 to 0.250 | 1.24 to 6.35 | 0.025 | 0.64 |
| Over 5 to 7½ (127.0 to 190.5), incl | over 0.250 | over 6.35 | 0.030 | 0.76 |
| Over 7½ to 16 (190.5 to 406.4), incl | all | all | 0.00125 in./in. or mm/mm of circumference | |
Delivery State
| Delivery State Choice | Surface Condition |
|---|---|
| Hot Rolled | Silver Bright |
| Polished (320#, 400#, 600#, Mirror finish) | |
| Cold Rolled | Silver Bright |
| Polished (320#, 400#, 600#, Mirror finish) | |
| Note: 1. If you require different deliver state than the above listed, kindly confirm with us. 2. In case of any enquiry or order, please kindly let us know any extra requirement not indicated here. |
|
Package
Plastic Bag
Wooden case
In CIVMATS, all of our stainless steel welded pipes & tubes are packaged as per international standard to prevent any possible damage or loss. By default, we will use thick woven plastic bag to bundle the finished pipes & tubes together in batches. However, for some special pipes & tubes that are vulnerable to dirt, scratches, stress or rough handling, we will suggest wooden case for protection. Kindly note, wooden case can incur extra cost, not only its own cost, but also the increased freight cost, which is especially true for air transportation. For enhanced customer experience, we also provide dedicated package as per your special requirements.
Logistics
By Sea
By Air
By default, we will quote based on sea transportation, such as FOB, CFR, CIF and the like for most enquiries or orders. Quotation based on air transportation is also optional upon your request for urgent demands.
FAQ
What’s the finish of your stainless steel welded pipe?
For industrial application, the finish of our stainless steel welded pipe is No.1 or pickled finish. We can also do polished SS welded pipe, like 320#, 400#, 600# or mirror finish as per your requirement. In case of enquiry or order, please also indicate which side you want to do the polishing, external, internal or both.
What is the standard length? Can I have the tubes/pipes cut into the length I want?
Our standard length of SS welded pipe is 5.8m or 6meter for most overseas orders.
Yes, we can cut pipes into the length you want, but this can incur extra cost. In case of order, please also indicate the cutting method you prefer. We have laser cutting, plasma cutting and water-jet cutting for your options.
Do you also have SS pipe fittings?
Yes, we have, like elbows, flanges, reducers, etc. For detailed information, please kindly refer to our product.
Where's your main market?
South America, South-East Asia, Middle-East, Europe and so on.
What's your package for SS welded pipe?
By default, our package is thick woven plastic bag, but we also provide wooden case or dedicated package as per your requirement. You can also refer to our pictures for better understanding.
How long is your delivery time?
Normally, it takes two weeks for us to complete production of SS welded tube for order quantity less than two containers, but the delivery time might also be influenced by other factors such as special grade, special size, large quantity of the product itself, or some force majeure.