Excerpt:
For chemical, heat-exchanger and corrosion-resistant piping requiring molybdenum-bearing stainless steel. TP316L generally offers better pitting resistance than Mo-free 304L; medium, temperature and crevices remain critical selection factors.
QIDA METAL · PRODUCT PROCUREMENT GUIDE
ASTM A312 TP316L Stainless Steel Pipe
For chemical, heat-exchanger and corrosion-resistant piping requiring molybdenum-bearing stainless steel. TP316L generally offers better pitting resistance than Mo-free 304L; medium, temperature and crevices remain critical selection factors.
| Procurement Item | Details |
|---|---|
| Applicable Standard | ASTM A312/A312M / TP316L |
| Product Category | Steel Pipes & Tubes / Stainless Steel 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
- A defined Mo range supports material comparison against actual corrosion conditions.
- Review welded and seamless routes separately for diameter, wall, cost and inspection requirements.
- Assess fittings, fasteners and support contact materials together to reduce galvanic and crevice-corrosion risks.
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 |
|---|---|---|
| Manufacture / Condition | Seamless or longitudinally welded as ordered; solution heat treated | A polished appearance does not replace heat-treatment records. |
| Size Designation | Common NPS 1/2–12 dimensions below; submit larger or custom OD×WT enquiries. | ASME B36.19M; S schedules are not automatically identical to B36.10. |
| Length / m | 6, 12 or specified fixed / random lengths | Confirm manufacturing route and thin-wall long-length capability before quotation. |
| Surface | Pickled; external polishing or special cleanliness by agreement | Specify internal and external roughness separately. |
| Pipe Ends | Plain or bevelled with end protection | Confirm bevel angle, root face, cleanliness and dimensional tolerance for welding. |
| Tolerances / Acceptance | Applicable A312 and A999 general requirements | State nominal / minimum wall, specimens and test methods. |
Common ASME B36.19M Dimensions (mm)
| NPS / in | OD | Sch 10S Wall | Sch 40S Wall | Sch 80S Wall |
|---|---|---|---|---|
| 1/2 | 21.3 | 2.11 | 2.77 | 3.73 |
| 3/4 | 26.7 | 2.11 | 2.87 | 3.91 |
| 1 | 33.4 | 2.77 | 3.38 | 4.55 |
| 1½ | 48.3 | 2.77 | 3.68 | 5.08 |
| 2 | 60.3 | 2.77 | 3.91 | 5.54 |
| 3 | 88.9 | 3.05 | 5.49 | 7.62 |
| 4 | 114.3 | 3.05 | 6.02 | 8.56 |
| 6 | 168.3 | 3.40 | 7.11 | 10.97 |
| 8 | 219.1 | 3.76 | 8.18 | 12.70 |
| 10 | 273.0 | 4.19 | 9.27 | 12.70 |
| 12 | 323.9 | 4.57 | 9.53 | 12.70 |
03 / Standard Chemical Composition
ASTM A312/A312M / TP316L. 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 | ≤0.035 |
| Si | ≤1.00 |
| Mn | ≤2.00 |
| P | ≤0.045 |
| S | ≤0.030 |
| Cr | 16.0–18.0 |
| Ni | 10.0–14.0 |
| Mo | 2.0–3.0 |
| Fe | Balance |
Standard A312 pipe composition, mass %. Mo helps pitting resistance but does not establish suitability for every seawater condition, temperature or chloride concentration.
04 / Mechanical Properties & Application Limits
| Thickness / Material Condition | Yield Strength Re / Rp0.2 (MPa) | Tensile Strength Rm (MPa) | Elongation After Fracture A (%) |
|---|---|---|---|
| Solution treated, room temperature | Rp0.2 ≥170 | ≥485 | Longitudinal ≥35 / transverse ≥25 |
Strength in MPa, elongation in %, with direction and thin-wall adjustments per A312. Corrosion resistance also depends on medium, temperature, crevices and post-weld cleaning. Elevated-temperature allowable stresses follow the project code.
05 / Inspection, Processing & Quality Checks
- Check grade, manufacturing route, solution heat treatment, heat number and finished-pipe inspection documents.
- PMI supports Cr / Ni / Mo identification. Verify carbon using a suitable method; XRF alone does not establish a low-carbon grade.
- Agree tensile, flattening / bending, hydrostatic or applicable electrical tests. Weld NDT class follows project requirements.
- High-cleanliness, hygienic and special corrosion service need specified finish, cleaning, passivation and tests; compliance is application-specific.
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:
A312 edition / TP316L + seamless or welded + NPS / Sch or OD×WT + length + finish / cleanliness + ends + quantity + inspection documents + destination port. Include project drawings 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.
