HYG Benelux BV offers a comprehensive range of Ultra-High Purity (UHP) products, including Seamless & Welded Tubes, UHP Coaxial Tubing, ASME BPE, 3A, and KS standards. With a focus on precision and reliability, our products are designed to meet the stringent requirements of critical applications. We ensure quick availability and tailored solutions to support your specific needs.

UHP Seamless & Welded
Ultra high purity for semiconductor, microelectronics applications.Item
- Stainless Steel Tubes & Fittings
Applicable Specifications
- ASTM A249, A269, A632, ASME SA249, SA269
- ASTM A213, ASME SA213
- JIS G3459
Typical Materials
- 316/L single melt, EN1.4404, 316/L double melt (optional)
- * Other materials available upon request
Finish
- EP ID 0.25μm max, OD Mechanically Polished 0.80μm
- BA ID 0.38μm max, OD Mechanically Polished 0.80μm
- BA.AC (Anodic Cleaned) ID 0.38μm max, OD Mechanically Polished 0.80μm
Dimension
- Imperial Sizes : OD .125” – 6”
- A Sizes : OD 15A – 600A
Technical Requirements
- Precision cleaned with warm ultra pure supersonic immerse & inner cleaning
- N2 purged with heated and filtered nitrogen (gas purity 99.9998%)
- Cleaned, purged and packaged in clean room Class 100
- Individually End-capped, Double PE Sleeved, Wooden Box Packaging
- Particle & Oil Residue Tested
- Intergranular Corrosion Tested acc. to ASTM A 262 Practice E (optional)

UHP COAXIAL
Ultra High Purity for special gas handling applicationsItem
- Stainless Steel Coaxial Tubes & Fittings
Applicable Specifications
- ASTM A213, A269, A632, JIS G3459
Typical Materials
Inner Process Tube
- 316/L single melt – seam type : seamless
- 316/L double melt (optional)
Outer Containment Tube
- 304 – seam type : welded
- 304, 304/L, 316/L: seam type – seamless (optional)
Finish
EP | Inner Process Tube
- ID 0.25μm max or 10 Ra max
BA | Outer Containment Tube
- ID Bright Annealed, OD Mechanically Polished 0.80μm
Dimension
Imperial Sizes
- .250” x .500”.375” x .625”.500” x .750”
- .750” x 1.00”1.00” x 1.25”1.00” x 1.50”
- 1.50” x 2.00”2.00” x 2.50”
Length
- 4m
- 6m
Technical Requirements
- Precision cleaned with warm ultra pure supersonic immerse & inner cleaning
- N2 purged with heated and filtered nitrogen (gas purity 99.9998%)
- Cleaned, purged and packaged in clean room Class 100
- Individually End- capped, Double PE Sleeved, Wooden Box Packaging
- Particle & Oil Residue Tested
- Outer Containment Tube – Helium – leak Tested (optional)
- Intergranular Corrosion Tested acc. to ASTM A262 Practice E (optional)

ASME BPE
For Pharmaceutical ApplicationsItem
- Stainless Steel Tubes & Fittings
Applicable Specifications
- ASME SA249, ASTM A269, A270-S2, ASME BPE
Typical Materials
- TP316L, EN1.4404, EN1.4435 restricted sulfur (0.005 – 0.015%)
Finish
| Surface | ID | OD | Polish Method | Polish Method |
|---|---|---|---|---|
| Finish | Ra (µ-inch/µm) | Ra (µ-inch/µm) | ID | OD |
| SF0 | BA/BA | BA/BA | Unpolished | Unpolished |
| SF1 | 20/0.50 | 32/0.8 | Mechanically Polished | Mechanically Polished |
| SF2 | 25/0.63 | 32/0.8 | Mechanically Polished | Mechanically Polished |
| SF3 | 30/0.76 | 32/0.8 | Mechanically Polished | Mechanically Polished |
| SF4 | 15/0.38 | 32/0.8 | Electro-polished | Mechanically Polished |
| SF5 | 20/0.50 | 32/0.8 | Electro-polished | Mechanically Polished |
| SF6 | 25/0.63 | 32/0.9 | Electro-polished | Mechanically Polished |
Dimension
- Imperial Sizes: OD 1/4” – 6”
Technical Requirements
- Intergranular Corrosion Tested acc. to ASTM A270 S1
- Weld Decay Test acc. to ASTM A249 S7
- Meets minimum surface requirements (Cr/Fe Ratio. Depth Acc. H-3.3-1)
- Thermocouple Cleaned according to ASTM A632 / S3
- CFOS cleaning according to CGA G-4.1 and ASTM G 93-03 (optional)

3A, KS
For Food and Beverage, Hygienic ApplicationsItem
- Stainless Steel Tube
Applicable Specifications
- ASTM A270, KS D 3585
Typical Materials
- 304, 304/L, 316/L
Finish
| Surface | ID | OD | Polish Method | Polish Method |
|---|---|---|---|---|
| Finish | Ra (µ-inch/µm) | Ra (µ-inch/µm) | ID | OD |
| BA | BA/BA | BA/BA | Unpolished | Unpolished |
| BAP | BA/BA | 32/0.8 | Unpolished | Mechanically Polished |
| PBA | 20/0.5 | BA/BA | Mechanically Polished | Unpolished |
| MP | 25/0.5 | 32/0.8 | Mechanically Polished | Mechanically Polished |
Dimension
- Imperial Sizes : OD 1/4” – 6”
- A Sizes : 15A – 150A
Technical Requirements
- Thermocouple Cleaned according to ASTM A632/S3 (optional)
- Intergranular Corrosion Tested acc. to ASTM A270 S1
