Excerpt:
Low-carbon, cold-drawn seamless tubing for heat exchangers, condensers and similar heat-transfer equipment. Focus on minimum wall, tube ends, straightness, heat treatment and suitability for tube expansion.
QIDA METAL · PRODUCT PROCUREMENT GUIDE
ASTM A179 Cold Drawn Seamless Tube
Low-carbon, cold-drawn seamless tubing for heat exchangers, condensers and similar heat-transfer equipment. Focus on minimum wall, tube ends, straightness, heat treatment and suitability for tube expansion.
| Procurement Item | Details |
|---|---|
| Applicable Standard | ASTM A179/A179M |
| Product Category | Steel Pipes & Tubes / Seamless Pipe |
| Dimensions & Quantity | The sizes below are enquiry references. Available combinations, quantities and delivery times are subject to written quotation. |
| Documentation | Specify heat/batch inspection documents, standard edition, traceability and project certification in your enquiry. Documents are subject to confirmation of actual availability. |
01 / Product Features & Selection
- Specify actual OD and minimum wall to match tube-sheet holes and expanded-joint lengths.
- Low-carbon material and cold drawing support precise dimensions; tolerances follow A450 / A179 and the agreed order.
- Enquire separately for straight and U-bent tubes, defining bend thinning, radius and inspection.
02 / Specifications, Dimensions & Ordering Options
These dimensions help define your purchase requirement; they do not imply that every combination is in stock. Specify tolerances, quantity, delivery condition and destination port. Submit drawings for special sizes.
| Parameter | Specification / Enquiry Range | Points to Confirm |
|---|---|---|
| Common Outside Diameters / mm | 12.7, 15.88, 19.05, 25.4, 31.75, 38.1, 50.8, 63.5, 76.2 | Actual OD and tolerance must match the tube-sheet design. |
| Minimum Wall Thickness / mm | 1.24, 1.65, 2.11, 2.77, 3.40, 4.19, 5.16 | Select for the engineering requirement; nominal wall and minimum wall are different ordering bases. |
| Individual Tube Length | Cut lengths to suit the exchanger bundle and tube-sheet spacing. | State end allowances, end squareness and the permitted proportion of short lengths. |
| Heat Treatment & Hardness | Heat treated after cold drawing as required; hardness ≤72 HRB | Confirm the material condition needed for tube expansion at enquiry stage. |
| Bending Options | U-bend radius, leg length, centre distance and minimum wall after bending to drawing | Agree any post-bend heat treatment and inspection separately. |
| Surface & Cleanliness | Clean internal / external surfaces with protected ends | Pickling / oiling must be compatible with service cleanliness requirements. |
03 / Standard Chemical Composition
ASTM A179/A179M. Values are mass percentages (%). Maximum limits are shown by ≤, minimum limits by ≥; ranges are specification limits and Fe is the balance. These are not measured results for a current delivery heat.
| Element / Indicator | Requirement or Range |
|---|---|
| C | 0.06–0.18 |
| Mn | 0.27–0.63 |
| P | ≤0.035 |
| S | ≤0.035 |
| Fe | Balance |
Heat analysis, mass %. Low-carbon cold-drawn heat-exchanger tubing is different from A106 pressure pipe.
04 / Mechanical Properties & Application Limits
| Thickness / Material Condition | Yield Strength Re / Rp0.2 (MPa) | Tensile Strength Rm (MPa) | Elongation After Fracture A (%) |
|---|---|---|---|
| Cold drawn and heat treated, standard specimen | ≥180 | ≥325 | ≥35 (thin-wall adjustments apply) |
Strength in MPa; hardness ≤72 HRB. A179-24 gives tensile / elongation reference values that may be used for design; these are not automatically mandatory batch tests. Specify actual tensile testing when required and verify A450 requirements for the wall thickness and specimen.
05 / Inspection, Processing & Quality Checks
- Check A179/A179M and A450 general requirements, minimum-wall ordering and bundle drawings.
- Confirm tensile, flattening, flaring, flange, hardness and applicable hydrostatic / electrical tests.
- Check straightness, ends, wall eccentricity and internal surface. Bright appearance does not establish heat-transfer performance.
- Group bundles by drawing number / length to avoid installation errors.
06 / Export Packaging for This Product
| Stage | Recommended Arrangement | Key Considerations |
|---|---|---|
| End Protection | Use end caps, bevel guards or thread protectors appropriate to the pipe ends. | Keep stainless steel surfaces free of carbon-steel particles and chloride contamination. |
| Size-Separated Bundles | Bundle by OD, wall thickness, length and heat/batch, with durable identification. | Use liners or supported crates for small-diameter thin-wall tubes where appropriate. |
| Transport Support | Multiple supports, strap padding, anti-roll chocks and securing arrangements. | Keep long lengths properly supported; verify package weight and length before loading. |
Before shipment, cross-check product, grade, heat number, size, piece count, net weight and gross weight against the packing list. Match labels to inspection documents. For solid-wood pallets, dunnage or crates, check destination-country rules; wood subject to ISPM 15 must be treated and marked by an approved provider. Load dry cargo and arrange supports, blocking and securing according to weight and centre of gravity.
07 / How Qida Supports Your Procurement
| Procurement Stage | Qida Coordination | Information for the Buyer |
|---|---|---|
| Requirement Review | Review application, standards, material condition, drawings and acceptance items. | A checkable specification list helps reduce language and unit-conversion errors. |
| Order Confirmation | Confirm material, processing, inspection, packaging, delivery milestones and cost responsibilities item by item. | A clear written quotation and mutually agreed purchase requirements. |
| Delivery Coordination | Coordinate production / sourcing progress, labels, packing lists and shipping documents. | Check dimensions, quantities and heat/batch correspondence at agreed milestones. |
| After-Sales Follow-Up | Review issues using order number, heat number, arrival photographs and test records. | A defined issue description and documented resolution communications. |
Qida focuses on clear specifications, material requirement checks and delivery coordination. Include cutting, cut-to-length, surface treatment, third-party inspection and certificate requirements in your enquiry so that the achievable scope can be agreed before order placement.
08 / Request for Quotation
For an accurate quotation, please provide:
A179/A179M edition + OD × minimum wall + fixed length / piece count + straight-tube or U-bend drawing + heat treatment / testing + cleanliness + destination port. Include project specifications and inspection plans.
Define Specifications, Quality and Delivery in One Enquiry
Send your purchasing list to Shandong Qida Metal Technology Co., Ltd. We will review standards, dimensions and destination requirements with you.
Send an Enquiry · qidamt@163.com
139-6951-8618
Technical Sources & Ordering Notes
This selection and enquiry guide is compiled from the primary public sources below. Values are not an inspection certificate for a delivery batch and do not imply a supply or authorization relationship with the source publishers. The agreed order governs standard edition, product form, thickness range, specimen and delivery condition. Similar grades are not automatically equivalent. Confirm project certification and inspection documents before ordering.
