Custom Stainless Steel
Tube Fabrication & Processing
TeCarve’s Custom Stainless Steel Tube Fabrication & Secondary Processing services provide precision end-to-end manufacturing for OEM tubular components and complex assemblies. Our advanced secondary processing capabilities include precision CNC rotary-draw tube bending, end flaring, swaging/reducing, dome closing and capping, CNC hole punching, and multi-axis laser tube cutting to tight engineering tolerances.
Fabricated from premium stainless steel grades including 304, 304L, 316, 316L, 321, and 2205 duplex alloys, our custom tube components deliver superior corrosion resistance, high structural strength, and reliable leak-tight performance across fluid handling, industrial equipment, process piping, and architectural systems.
Every production batch is backed by rigorous dimensional verification and certified quality management under ISO 9001:2015, delivering custom fabricated tube solutions tailored to your technical drawings and project specifications.
Stainless Steel Pipe Fittings & Precision Secondary Tube Processing
Specifications
Capability by Standard
Markets: N. America — wrought stainless steel pipe fittings, custom-processed
| Processing Methods | CNC Precision Machining & Threading: Multi-axis CNC turning, ASME B16.11 precision threading (NPT / BSPT / UNF), ASME B16.25 weld end compound beveling, counterboring, and facing |
|---|---|
| Component Types | ASME B16.9 butt-weld elbows & tees, concentric/eccentric reducers, stub ends (Type A/B/C lap joints), socket-weld couplings, and custom threaded boss adapters |
| Surface Finish | Pickled & passivated, bright annealed, or 180–320 grit satin external finish |
| Fitting Class (A403 Table 1) | S = seamless, no NDE required · W = welded, RT or UT · WX = welded, full RT · WU = welded, full UT |
| Tolerance Basis | Sizes/shapes per ASME B16.9 (butt-weld), ASME B16.11 (socket-weld & threaded), or MSS SP-79/83/95/97 as applicable by fitting type (A403 §12.1) — A403 itself sets no independent dimensional tolerance. Non-standard shapes furnished per Supplementary Requirement S58, confirmed against the customer drawing. |
- Integrated Secondary Capabilities: Multi-axis CNC turning, rotary draw tube bending, 3D laser cutting & slotting, hydraulic flaring & swaging, and orbital TIG welding
- Available Grades: 304, 304L, 316, 316L, 321, 347, 904L, 2205 Duplex (per ASTM A403 / EN 10253 / JIS B2311 / GB/T 12459)
- Surface Treatment Options: Annealed, pickled & passivated, mechanical satin/mirror polish, or electropolished (EP)
- Tolerance Compliance: Dimensions per ASME B16.9/B16.11, EN 10253-4, JIS B2311, or GB/T 12459; custom drawing tolerances verified per engineering specification
Markets: Europe — butt-welding pipe fittings, custom-processed
| Processing Methods | Tube Bending & Orbital Assembly: CNC multi-die rotary draw bending (R ≥ 1.5D), tight-radius mandrel bending, T-Drill mechanical collaring/necking, and robotic orbital TIG welding |
|---|---|
| Component Types | EN 10253-4 Type A/B butt-weld elbows, equal & reducing tees, concentric reducers, sanitary tri-clamp spools, and custom bent piping manifolds |
| Surface Finish | Acid descaled & pickled, mechanical polish (Ra ≤ 0.8 μm), or hygienic mirror finish |
| Tolerance Basis | Per EN 10253-4 general fitting tolerance clause; exact figures confirmed against the customer drawing |
- Integrated Secondary Capabilities: Multi-axis CNC turning, rotary draw tube bending, 3D laser cutting & slotting, hydraulic flaring & swaging, and orbital TIG welding
- Available Grades: 304, 304L, 316, 316L, 321, 347, 904L, 2205 Duplex (per ASTM A403 / EN 10253 / JIS B2311 / GB/T 12459)
- Surface Treatment Options: Annealed, pickled & passivated, mechanical satin/mirror polish, or electropolished (EP)
- Tolerance Compliance: Dimensions per ASME B16.9/B16.11, EN 10253-4, JIS B2311, or GB/T 12459; custom drawing tolerances verified per engineering specification
Markets: Japan, Southeast Asia — steel butt-welding pipe fittings, custom-processed
| Processing Methods | 3D Laser Cutting & Precision Drilling: 5-axis fiber laser tube cutting, high-density hole perforating, axial/circumferential slotting, compound miter cuts, and laser engraving |
|---|---|
| Component Types | JIS butt-weld short/long radius elbows, perforated manifold tubes, precision laser-slotted filter cores, instrumentation adapters, and sensor well housings |
| Surface Finish | Ultrasonic degreased, mechanical mirror buffing, or ultra-clean electropolishing (EP Ra ≤ 0.2 μm) |
| Tolerance Basis | Per JIS B2311 general fitting tolerance clause; exact figures confirmed against the customer drawing |
- Integrated Secondary Capabilities: Multi-axis CNC turning, rotary draw tube bending, 3D laser cutting & slotting, hydraulic flaring & swaging, and orbital TIG welding
- Available Grades: 304, 304L, 316, 316L, 321, 347, 904L, 2205 Duplex (per ASTM A403 / EN 10253 / JIS B2311 / GB/T 12459)
- Surface Treatment Options: Annealed, pickled & passivated, mechanical satin/mirror polish, or electropolished (EP)
- Tolerance Compliance: Dimensions per ASME B16.9/B16.11, EN 10253-4, JIS B2311, or GB/T 12459; custom drawing tolerances verified per engineering specification
Markets: China domestic & Belt-and-Road — steel butt-welding pipe fittings, custom-processed
| Processing Methods | End Forming, Flaring & Swaging: Hydraulic bell-mouth flaring, cold/hot end swaging (reducing), bead rolling, conical expansion, and mandrel push-forming |
|---|---|
| Component Types | GB/T 12459 seamless & welded pipe fittings, flared lap-joint stub ends, heavy-wall conical reducers, high-pressure branch spools, and fabricated pipe manifolds |
| Surface Finish | Industrial pickling and passivation, sandblasted, or Ra ≤ 1.6 μm commercial polish |
| Tolerance Basis | Per GB/T 12459 general fitting tolerance clause; exact figures confirmed against the customer drawing |
- Integrated Secondary Capabilities: Multi-axis CNC turning, rotary draw tube bending, 3D laser cutting & slotting, hydraulic flaring & swaging, and orbital TIG welding
- Available Grades: 304, 304L, 316, 316L, 321, 347, 904L, 2205 Duplex (per ASTM A403 / EN 10253 / JIS B2311 / GB/T 12459)
- Surface Treatment Options: Annealed, pickled & passivated, mechanical satin/mirror polish, or electropolished (EP)
- Tolerance Compliance: Dimensions per ASME B16.9/B16.11, EN 10253-4, JIS B2311, or GB/T 12459; custom drawing tolerances verified per engineering specification
For pressure-containing assemblies and traceable project supply, explore our oil and gas industry solutions.
For matching straight fluid-conveyance runs and high-pressure line pipe, pair these components with our Stainless Steel Seamless Pipe & Tube.
Get Your Custom Fabrication & Drawing Review
Sourcing custom fabricated tube assemblies, secondary machined fittings, precision CNC tube bending, end-forming, flaring, or laser cut manifolds? Submit your 2D/3D CAD drawings (DWG, DXF, STEP, IGES, PDF) to our engineering desk for rapid feasibility assessment, DFM feedback, and tooling quote.
Direct engineer-to-engineer drawing evaluation (DWG/STEP/PDF) for bending radii, wall thinning, and machining limits within 2 hours.
First-article prototype fabrication and sample verification prior to batch production runs to validate assembly tolerances.
Low minimum batch quantities and prototype development orders supported without mass-production tooling lock-in.
100% CMM coordinate dimensional reporting, weld seam NDT, pressure leak testing, and complete EN 10204 3.1 certification.
Standards
→ Scroll right for full chemistry & mechanical data
| Grade | US (UNS) | EN (W.Nr.) | Japan (JIS) | China (GB/T) | C % (Max) | Si % (Max) | Mn % (Max) | P % (Max) | S % (Max) | Cr % | Ni % | Mo % | Tensile σb (Min.) | Yield σ0.2 (Min.) | Elongation (Min.) | Hardness (Max) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 304 | S30400 | 1.4301 | SUS304 | 06Cr19Ni10 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-11.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤92 HRB / ≤215 HV |
| 304L | S30403 | 1.4307 | SUS304L | 022Cr19Ni10 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-12.0 | — | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 35% | ≤92 HRB / ≤215 HV |
| 316 | S31600 | 1.4401 | SUS316 | 06Cr17Ni12Mo2 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 316L | S31603 | 1.4404 | SUS316L | 022Cr17Ni12Mo2 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 321 | S32100 | 1.4541 | SUS321 | 06Cr18Ni11Ti | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 17.0-19.0 | 9.0-12.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 347 | S34700 | 1.4550 | SUS347 | 06Cr18Ni11Nb | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 17.0-19.0 | 9.0-13.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤92 HRB / ≤215 HV |
- Standards Conformance: ASTM A403/A269/A270 · EN 10253-4/10217/10357 · DIN 2605/2615/2616 · JIS B2311/G3447 · GB/T 12459/13401
- Delivery Condition: Solution Annealed & Pickled (AP) / Bright Annealed (BA) / Polished, or as requested.
- Mill Test Certificate: 100% full material traceability with EN 10204 3.1 MTC provided with every shipment.
Features
• Precision deep-processing with CNC and laser technologies
• Wide range of stainless steel grades and finishes
• Fully customizable fittings to meet client drawings
• Enhanced durability and resistance to pressure and corrosion
• Petrochemical and oil & gas installations
• High-purity food & pharmaceutical processing pipelines
• High-precision machinery and equipment
• Construction, decoration, and architectural tubing
• Custom engineering and OEM projects
Applications
For fabricated fittings and custom manifold assemblies, learn how to verify our partners’ fabrication workshops, precision beveling, weld radiography, and dimensional CMM checks.
Quality Control
• Raw material certification and traceability
• CNC machining with dimensional inspection
• Laser drilling and engraving accuracy verification
• Surface finish and corrosion resistance testing
• Final inspection with client-specific standards
packaging
PVC Wrapping
& End Caps
Custom Barcoding
& Labeling
Anti-Corrosion
& Moisture Protection
Seaworthy Wooden Cases & Pallets
Processed Fittings Quality & Packaging Photos
Real product, inspection, packaging and loading photos.
Tailored Solutions, Timely Fulfillment
CUSTOMIZATION
& DELIVERY
Flexible Custom Manufacturing
We tailor highly processed stainless steel pipe fittings to customer drawings through the page's listed flaring, reducing, CNC machining, laser drilling, cutting, and engraving processes, with selectable grades and finishes.
Low MOQ & Rapid Prototyping
MOQ is as low as 100–300 kg for flexible trial orders, with small batch customization and sample production supported, helping you shorten your development cycle and market entry.
Optimized Lead Time
In-stock standard sizes ship within 7–10 days. Custom specifications typically ship within 10–25 days after deposit, depending on order volume, dimensions, and surface finish. The full cycle—from inquiry and drawing confirmation through sampling, production, inspection, and dispatch—typically takes 33–55 days for custom items.
Global Logistics & On-Time Delivery
For processed fitting shipments worldwide, seaworthy wooden cases and pallets protect machined parts while custom barcoding and labeling preserves drawing and batch identification.
How your order is made, checked and shipped
Tube forming at the partner factory
Heat treatment (annealing)
Dimensional inspection
Alloy verification with a handheld analyzer
Export packing
Container loading
What Overseas Buyers Say About TeCarve Tubing
“I've received the goods and everything is fine.”
“The goods already send to customers. I am waiting for the next order from them.”
“…there is no need of inspection this time… I trust in your product.”
Frequently Asked Questions
What types of stainless steel pipe fittings does TeCarve supply?
TeCarve supplies a complete range of butt-weld fittings: elbows (45°, 90°, 180°), equal and reducing tees, concentric and eccentric reducers, caps, stub ends, crosses, and weldolets. All is manufactured to ASME B16.9, ASME B16.28, or MSS SP-43 dimensional standards.
What grades are available for stainless steel pipe fittings?
Fittings are supplied in grades WP304, WP304L, WP316, WP316L, WP321, WP347, and duplex WP2205/WP2507, conforming to ASTM A403 (wrought austenitic) and ASTM A815 (duplex and super duplex) specifications.
What size range do your stainless steel butt-weld fittings cover?
We supply butt-weld fittings from ½" (DN15) to 48" (DN1200) nominal pipe size in schedules 5S, 10S, 40S, and 80S. Large-diameter fittings and non-standard wall thicknesses are manufactured to project specifications and customer drawings.
What custom machining and processing services are available for pipe fittings?
Beyond standard fittings, TeCarve offers CNC precision-bore machining, custom face-to-face dimensions, flanged stub ends, post-weld heat treatment, and full NDE package (RT, UT, MT, PT) per ASME VIII, ASME B31.3, or EN 13480.
What documentation and certifications are provided with stainless steel fittings?
Every shipment includes EN 10204 3.1 (or 3.2 on request) Mill Test Certificates, dimensional inspection reports, heat treatment records, NDE test reports, and pressure test certificates. ISO 15156 compliance documentation is available for sour service piping.
What secondary tube processing services does TeCarve provide?
We provide precision CNC tube bending, flaring, swaging, closing/capping, precision cutting, and CNC machining according to customer drawings in grades 304 and 316L at our partner factories.
Can prototype samples be provided for secondary processed tube parts?
Yes. Custom processed tube samples are prepared within 5–7 business days. Custom sample fees are 100% credited against subsequent commercial batch orders.
Contact TeCarve