Yuhong Group Co., Ltd. supplies ASTM B111 C12200 seamless copper tube for shell-and-tube heat exchangers, condensers, and evaporators. Manufactured to ASTM B111 under UNS C12200, this tube is delivered in the seamless cold-drawn condition with dimensional consistency for tube bundles, U-tubes, and finned tubes.
The seamless construction eliminates longitudinal weld seams, which are a known failure point in welded tube under thermal cycling. The tube can be specified to custom lengths up to 100 ft and tolerances matched to your tubesheet drilling schedule, reducing field fit-up issues during retubing.
Dimensional consistency directly affects bundle assembly efficiency and retubing. Table 1 summarizes acceptance criteria defined in ASTM B111.
| Parameter | Range | Tolerance |
|---|---|---|
| Outside Diameter | ≤ 0.500 in | ±0.003 in (wall 0.020 in); ±0.0025 in (wall ≥ 0.049 in) |
| Outside Diameter | 0.500–0.740 in | ±0.004 in |
| Outside Diameter | 0.740–1.000 in | ±0.005–0.006 in |
| Wall Thickness | 0.049–0.058 in, OD ≤ 1 in | ±0.004 in |
| Wall Thickness | 0.058–0.083 in, OD ≤ 1 in | ±0.005 in |
| Length | ≤ 15 ft | +3/32 in, 0 in |
| Length | 15–20 ft | +1/8 in, 0 in |
| Squareness of Cut | ≤ 5/8 in | 0.010 in |
| Squareness of Cut | > 5/8 in | 0.016 in/in of diameter |
| Test | Requirement |
|---|---|
| Hydrostatic | P = 2St/(D−0.8t); cap 1000 psi [7.0 MPa] unless specified |
| Pneumatic | 60 psig [400 kPa] min, 5 s, no leakage |
| Chemical Analysis | At least two replicate analyses |
| Retest | Twice the normal specimen count |
In condenser tube bundle replacement, tubes must fit existing tubesheet holes and withstand expansion. ASTM B111 C12200 seamless tube meets these requirements through outside diameter tolerances verified by "go" and "no-go" ring gages (per 14.1), wall thickness tolerances per Table 11, and cut squareness of 0.016 in/in of diameter for OD > 5/8 in — preventing damage to tubesheets and baffles during insertion.
For evaporator service, mercurous nitrate (B154) and ammonia vapor (B858) tests verify corrosion resistance. Lot sampling of 600 tubes or 10,000 lb [4550 kg] (16.1) ensures representative testing.
MOQ: 1000 kg; FOB Ningbo/Shanghai; Lead Time: 15–25 days after down payment.
Outside diameter is checked with "go" and "no-go" ring gages per 14.1; wall thickness is verified against Table 11. In cases of dispute, ring gages govern final determination.
Each lot includes chemical analysis, tension, expansion, flattening, mercurous nitrate, ammonia vapor, and grain size tests per Sections 17 and 19.
| Item | Requirement |
|---|---|
| Separation | By size, composition, and temper |
| Marking | Purchase order number, alloy designation, temper, size, shape, total length or piece count, supplier name |
| Protection | Acceptable to common carrier; protection from normal transportation hazards |
Tubes are packed in wooden crates or steel frames with end caps. Custom packaging available.
Specifying ASTM B111 C12200 seamless tube for your heat exchanger project? Contact Yuhong Group Co., Ltd. for technical data sheets, MOQ, FOB pricing, and lead time. Third-party inspection and mill test certificates available.
