Wholesale ASTM A269 304 stainless steel capillary tubing Suppliers, Pricelist

1 / 3

Wholesale ASTM A269 304 stainless steel capillary tubing Suppliers, Pricelist

1.Production standards: ASTM A269/A249 2.Stainless steel material :304 304L 316L(UNS S31603) Duplex 2205 (UNS S32205 & S31803) Super Duplex 2507 (UNS S32750) Incoloy 825 (UNS N08825) Inconel 625 (UNS N06625) 3. Size range: diameter 3MM(0.118”-25.4(1.0”)MM 4. Wall thicknesses: 0.5mm (0.020’’) to 3mm (0.118’’) 5.General delivery pipe status: half hard / soft bright annealing 6.The tolerance range: diameter: + 0.1mm, wall thickness: + 10%, length: -0/+6mm 7.Coil lengthsup to: 500MM-13500MM (45000feet)(can be adjusted according to customer requirements)

Send Inquiry

Product Description

Manufacturing Range

Stainless Steel Coil Tube

Stainless Steel Tube Coil

Stainless Steel Coil Tubing

Stainless Steel Coil Pipe

Coil Tube Suppliers

Coil Tube Manufacturers

Stainless Steel Pipe Coil

Stainless steel capillary and small tubes are widely used in medical treatment, fiber-optics, pen making, electronic welding products, light cable joints, food, vintage, dairy, drinks, pharmacy, and biochemistry. Different lengths can be provided according to specific requests.

Our capillary tubes feature a maximum bore of 0.0158 in. and are available in a wide range of stainless steels. These capillary tubes are characterized by tight tolerances, with inside surfaces free from oil, grease, and other particles. This design ensures an optimized and even flow of liquids and gases from the sensor to the measuring instrument.

Stainless steel coiled tubing is available in a range of different product forms depending on customer requirements. We manufacture high-quality welded and seamless tube products. Standard grades include 304, 304L, 316L (UNS S31603), Duplex 2205 (UNS S32205 & S31803), Super Duplex 2507 (UNS S32750), Incoloy 825 (UNS N08825), and Inconel 625 (UNS N06625). Other grades of stainless steel in duplex, superduplex, and nickel alloys are available on request.

Diameter options range from 3mm (0.118’’) to 25.4mm (1.00’’) OD. Wall thickness options range from 0.5mm (0.020’’) to 3mm (0.118’’). Tubing can be supplied in annealed or cold-worked stainless steel control line pipe conditions.

Specifications

Specification Item	Details
Thickness	0.1-2.0mm
Diameter	0.3-20mm (tolerance: ±0.01mm)
Stainless Grade	201, 202, 304, 304L, 316L, 317L, 321, 310s, 254mso, 904L, 2205, 625 etc.
Surface Finish	Inside and outside are both bright annealing, cleaning, and seamless, no leaks.
Standard	ASTM A269-2002, JIS G4305 / GB/T 12770-2002, GB/T12771-2002
Length	200-1500m per coil, or as customer required
Stock size	61mm, 80.5mm, 80.6mm, 80.8mm, 80.9mm, 81mm, 9.51mm, 101mm, etc.
Certificate	ISO & BV
Packing way	Woven bags, plastic bags etc.
Application range	Widely used in food industry, beverage equipment, beer machine, heat exchanger, milk/water supply system, medical equipment, solar energy, aviation, aerospace, communications, oil, and other industries.
Note	OEM / ODM / Buyer Label accepted.

Size Options for Stainless Steel Coil Tubes

Item	Grade	Size (MM)	Pressure (Mpa)	Length (M)
1	316L, 304L, 304, Alloy 625, 825, 2205, 2507	1/8″ × 0.025″	3200	500-35000
2	316L, 304L, 304, Alloy 625, 825, 2205, 2507	1/8″ × 0.035″	3200	500-35000
3	316L, 304L, 304, Alloy 625, 825, 2205, 2507	1/4″ × 0.035″	2000	500-35000
4	316L, 304L, 304, Alloy 625, 825, 2205, 2507	1/4″ × 0.049″	2000	500-35000
5	316L, 304L, 304, Alloy 625, 825, 2205, 2507	3/8″ × 0.035″	1500	500-35000
6	316L, 304L, 304, Alloy 625, 825, 2205, 2507	3/8″ × 0.049″	1500	500-35000
7	316L, 304L, 304, Alloy 625, 825, 2205, 2507	1/2″ × 0.049″	1000	500-35000
8	316L, 304L, 304, Alloy 625, 825, 2205, 2507	1/2″ × 0.065″	1000	500-35000
9	316L, 304L, 304, Alloy 625, 825, 2205, 2507	φ3mm × 0.7mm	3200	500-35000
10	316L, 304L, 304, Alloy 625, 825, 2205, 2507	φ3mm × 0.9mm	3200	500-35000
11	316L, 304L, 304, Alloy 625, 825, 2205, 2507	φ4mm × 0.9mm	3000	500-35000
12	316L, 304L, 304, Alloy 625, 825, 2205, 2507	φ4mm × 1.1mm	3000	500-35000
13	316L, 304L, 304, Alloy 625, 825, 2205, 2507	φ6mm × 0.9mm	2000	500-35000
14	316L, 304L, 304, Alloy 625, 825, 2205, 2507	φ6mm × 1.1mm	2000	500-35000
15	316L, 304L, 304, Alloy 625, 825, 2205, 2507	φ8mm × 1mm	1800	500-35000
16	316L, 304L, 304, Alloy 625, 825, 2205, 2507	φ8mm × 1.2mm	1800	500-35000
17	316L, 304L, 304, Alloy 625, 825, 2205, 2507	φ10mm × 1mm	1500	500-35000
18	316L, 304L, 304, Alloy 625, 825, 2205, 2507	φ10mm × 1.2mm	1500	500-35000
19	316L, 304L, 304, Alloy 625, 825, 2205, 2507	φ10mm × 2mm	500	500-35000
20	316L, 304L, 304, Alloy 625, 825, 2205, 2507	φ12mm × 1.5mm	500	500-35000

Pressure Tables

Selection of the appropriate material for any given control or chemical injection line is subject to the prevailing operational and site conditions. To assist in the selection, the following tables provide internal pressure ratings and adjustment factors for a range of common grades and sizes of seamless and laser-welded stainless tubing.

Maximum pressure (P) for TP 316L at 100°F (38°C)¹
Please refer to the grade and product form adjustment factors below.

Outside diameter (in.)	Wall thickness (in.)	Working pressure² psi (MPa)	Burst pressure³ psi (MPa)	Collapse pressure⁴ psi (MPa)
1/4	0.035	6,600 (46)	22,470 (155)	6,600 (46)
1/4	0.049	9,260 (64)	27,400 (189)	8,710 (60)
1/4	0.065	12,280 (85)	34,640 (239)	10,750 (74)
3/8	0.035	4,410 (30)	19,160 (132)	4,610 (32)
3/8	0.049	6,170 (43)	21,750 (150)	6,220 (43)
3/8	0.065	8,190 (56)	25,260 (174)	7,900 (54)
3/8	0.083	10,450 (72)	30,050 (207)	9,570 (66)
1/2	0.049	4,630 (32)	19,460 (134)	4,820 (33)
1/2	0.065	6,140 (42)	21,700 (150)	6,200 (43)
1/2	0.083	7,840 (54)	24,600 (170)	7,620 (53)
5/8	0.049	3,700 (26)	18,230 (126)	3,930 (27)
5/8	0.065	4,900 (34)	19,860 (137)	5,090 (35)
5/8	0.083	6,270 (43)	26,910 (151)	6,310 (44)
3/4	0.049	3,080 (21)	17,470 (120)	3,320 (23)
3/4	0.065	4,090 (28)	18,740 (129)	4,310 (30)
3/4	0.083	5,220 (36)	20,310 (140)	5,380 (37)

1) Estimates only. Actual pressures should be calculated considering all stress factors in the system.
2) Based on calculations from API 5C3, using a wall tolerance of +/-10%
3) Based on ultimate strength burst calculations from API 5C3
4) Based on yield strength collapse calculations from API 5C3

Adjustment factors for working pressure limits¹
Pw = reference working pressure rating for TP 316L at 100°F (38°C). To determine working pressure for a specific grade/temperature combination, multiply Pw by the adjustment factor.

Grade	100°F (38°C)	200°F (93°C)	300°F (149°C)	400°F (204°C)
TP 316L, seamless	1	0.87	0.7	0.63
TP 316L, welded	0.85	0.74	0.6	0.54
Alloy 825, seamless	1.33	1.17	1.1	1.03
Alloy 825, welded	1.13	1.99	1.94	0.88

1) Adjustment factors based on allowable stress in ASME.

Adjustment factors for burst pressure limits¹
Pb = reference burst pressure for TP 316L at 100°F. To determine burst pressure for a specific grade/temperature combination, multiply Pb by the adjustment factor.

Grade	100°F (38°C)	200°F (93°C)	300°F (149°C)	400°F (204°C)
TP 316L, seamless	1	0.93	0.87	0.8
TP 316L, welded	0.85	0.79	0.74	0.68
Alloy 825, seamless	1.13	1.07	1	0.87
Alloy 825, welded	0.96	0.91	0.85	0.74

1) Adjustment factors based on ultimate strength in ASME.

Factory & Production Gallery

Quality Advantage

The quality of our products for the control line in the oil and gas sector is assured not just during the controlled manufacturing process but also by way of finished product testing. Typical tests include:

Non-destructive tests: Verification of material integrity without causing damage.
Hydrostatic tests: High-pressure testing to ensure leak-free performance.
Surface finish controls: Ensuring smooth inner and outer surfaces.
Dimensional accuracy measurements: Strictly keeping tight tolerances.
Flare and coning tests: Evaluating the formability and connection safety.
Mechanical & chemical property testing: Assuring alloy compliance and strength.

Applications for Capillary Tubes

Medical device industry

Temperature-guided industrial control & sensors

Pens care industry core tubes

Micro-tube antennas & precision small antennas

Electronic small-diameter capillary tubes

Jewelry needle punch systems

Watch manufacturing and components

Car antenna tubes & bar antenna systems

Laser engraving equipment tubes

Fishing gear and accessories

Food & dietary handling systems

Styluses for mobile phones & computers

Heating pipe and oil industries

Printers & silent box needles

Double-melt stainless steel window-coupled tubes

Precision small diameter industrial tubes

Precision dispensing needles

Microphones, headphones & audio components

Frequently Asked Questions (FAQ)

What are the benefits of using seamless stainless steel coiled tubing?

Seamless coiled tubing reduces the risk of leaks associated with fittings and welds. Its continuous length makes it highly reliable for downhole control lines, chemical injection, and critical subsea applications.

What makes your capillary tubes suitable for precision instruments?

Our capillary tubes are manufactured with extremely tight tolerances and undergo strict processes to ensure the inner and outer surfaces are completely free of oil, grease, and particulate matter, ensuring smooth and consistent flow.

Which material grades are recommended for highly corrosive environments?

For severe, corrosive environments, Duplex 2205, Super Duplex 2507, Alloy 825, and Inconel 625 offer excellent resistance to pitting, crevice corrosion, and stress corrosion cracking.

How do temperature changes affect the working pressure limits of the tubes?

As operational temperatures rise, the maximum allowable working pressure decreases. Please refer to our adjustment factors tables to calculate correct pressure ratings for your specific temperature environment.

Are custom sizing, lengths, and OEM services supported?

Yes. We accept OEM/ODM specifications and buyer labeling. Coiled tubing can be manufactured in customized lengths ranging from 200m to 1500m per coil, and in specific diameter/wall thickness options depending on target applications.