Stainless Steel Pipes, Hygienic Tubes & Butt-Weld Fittings
Hongji supplies industrial pipes and tubes, clean and high-purity tubing, and butt-weld fittings to ASTM/ASME, JIS and GB standard systems. Products can be reviewed by product type, product standard, material grade, size, wall thickness and surface finish. Customers may also upload a BOM or drawing for specification review.
Industrial Pipes & Tubes
Industrial pipes and tubes include stainless steel welded and seamless pipe for industrial fluid transport, equipment piping and process piping. Switch between standard systems to review the applicable product standard, dimensional system, material grades and surface options for ASTM/ASME, JIS and GB products.
- Product standard
- ASTM A312/A312M
- Dimensional standards
- ASME B36.19M; ASME B36.10M as a supplementary dimensional standard
- Size format
- NPS × Schedule, with actual OD × WT also shown
- Size range
- DN15–DN250
- Common material grades
- TP304, TP304L, TP316L
- B36.19M schedules
- SCH 5S, 10S, 40S, 80S
- B36.10M schedules
- Selected according to project requirements
- Surface and delivery
- BA welded pipe available; cleaning to an oil- and grease-free condition can be specified
Clean & High-Purity Tubing
This section presents base tubes for hygienic processing and finished clean or high-purity tubing as two supply forms within the same product category. Both follow a tube-sizing approach and are specified by actual outside diameter and wall thickness (OD × WT), not NPS/Schedule.
Base tubes for hygienic processing
Tube stock supplied for subsequent surface finishing, cleaning or related processing; the delivery condition is confirmed against the order.
Finished clean and high-purity tubing
AP, BA, mechanically polished or EP surface condition, with cleaning, oil- and grease-free requirements, end capping, clean packaging and roughness acceptance requirements confirmed against the order.
Product Parameters
- Product standard
- ASTM A269/A269M
- Size format
- Actual OD × WT
- Actual OD
- Confirmed options include 25.4 mm (1 in OD) and 50.8 mm (2 in OD); other ODs are confirmed against the RFQ
- Wall thickness
- Confirmed against the RFQ or order
- Common material grades
- TP304L, TP316L
- Surface finishes
- AP, BA, mechanically polished (MP), electropolished (EP)
- Cleanliness
- Cleaning to an oil- and grease-free condition as specified
- End protection
- End capping
- Packaging
- Clean packaging
- Testing
- Surface roughness testing
25.4 mm and 50.8 mm are actual tube outside diameters, not DN25 or DN50 designations, and are not part of the NPS/Schedule industrial pipe sizing system.
Butt-Weld Fittings
The range includes elbows, tees, reducers and caps. Conventional stainless steel and special alloys are shown separately, followed by the applicable product, dimensional and material information for ASTM/ASME, JIS and GB standard systems.
Product Types
- Product / material standard
- ASTM A403/A403M
- Dimensional / design standard
- ASME B16.9
- Size format
- NPS/DN + Schedule or actual wall thickness + product type
- Size range
- DN15–DN250
- Common material grades
- WP304, WP304L, WP316L
- Wall thickness
- Matched to the Schedule or actual wall thickness of the connected pipe
Surface and Delivery Options
- BA — Bright Annealed
- AP — Annealed and Pickled
- Internal or external mechanical polishing
- EP — Electropolished
- Cleaning to an oil- and grease-free condition, end capping and clean packaging
The options displayed for a specific product reflect its size and the agreed order requirements.
Special-Alloy Fittings
- Duplex stainless steel product standard
- ASTM A815/A815M
- Nickel and high-temperature alloy product standard
- ASTM B366
- Dimensional standard
- ASME B16.9 or customer drawing
- Material direction
- Duplex stainless steels, high-temperature nickel alloys and related grades
- Size, wall thickness, grade and documentation
- Confirmed against project information
Planning a Pipe, Tubing or Fittings Purchase?
Send the product name, product standard, dimensional standard, size, wall thickness, material grade, surface finish, quantity, and any available drawings or purchasing list. Hongji will review the product parameters and confirm packaging, documentation and delivery requirements.
Upload BOM or Drawings