China ASTM 316 stainless steel capillary tubing Factories, Pricelist

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China ASTM 316 stainless steel capillary tubing Factories, 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)

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Product Description

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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.

Capillary tubes with a maximum bore of 0.0158 in. are available in a wide range of stainless steels. These capillary tubes are characterized by tight tolerances, and the inside surface of the tubes is free from oil, grease, and other particles. This ensures, for example, 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. Welded and seamless tube products are manufactured to industry standards. The 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 ranges from 3mm (0.118’’) to 25.4mm (1.00’’) OD. Wall thickness ranges from 0.5mm (0.020’’) to 3mm (0.118’’). Tubing can be supplied in the annealed or cold worked stainless steel control line pipe condition.

Size of 316 Stainless Steel Capillary Tubing

Specifications

Property	Specification Details
Brand Standard	Premium Quality Grade
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 annealed, cleaned, seamless, and leak-free.
Standard	ASTM A269-2002, JIS G4305 / GB/T 12770-2002, GB/T12771-2002
Length	200-1500m per coil, or customized as 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 machines, heat exchangers, milk/water supply systems, medical equipment, solar energy, aviation, aerospace, communications, oil, and other industries.
Note	OEM / ODM / Buyer Label accepted.

Size of Stainless Steel Coil Tube

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. In order to assist in the selection, the following tables provide internal pressure ratings and the adjustments 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)

Please refer to grade and product form adjustment factors below.

Outside diameter (in.)	Wall thickness (in.)	Working pressure psi (MPa)	Burst pressure psi (MPa)	Collapse pressure 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 limits

Pw = reference working pressure rating for TP 316L at 100°F (38°C). To determine working pressure for grade/temperature combination, multiply Pw by 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 limits

Pb = reference burst pressure for TP 316L at 100°F. To determine burst pressure for grade/temperature combination, multiply Pb by 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 Overview

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 rigorous finished product testing. Typical tests include:

Non-destructive tests
Hydrostatic tests
Surface finish controls
Dimensional accuracy measurements
Flare and coning tests
Mechanical and chemical property testing

Applications of Capillary Tube

01 Medical device industry

02 Temperature-guided industrial control, sensors used in pipes & thermometers

03 Core tubing for pen manufacturing

04 Micro-tube antennas and precision small-diameter antennas

05 Various electronic small-diameter applications

06 Jewelry needle punch fabrication

07 Watch and precision instrument components

08 Car antenna tubes and bar antennas

09 Laser engraving equipment tubing

10 Fishing gear accessories

11 Food and dietary grade capillaries

12 Mobile phone and computer stylus components

13 Heating pipe and oil industries

14 Printers and silent box needles

15 Double-melt stainless steel tubes in window-couplers

16 Precision small-diameter industrial tubes

17 Precision dispensing needles

18 Microphones, headphones, and related audio equipment components

Packaging & Finished Products

Frequently Asked Questions

What material grades are available for your coiled tubing?

Our coiled tubing is available in standard grades including 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 specialized grades are available upon request.

What size ranges can you provide for stainless steel coil pipes?

We supply tubing with outside diameters (OD) ranging from 3mm (0.118’’) up to 25.4mm (1.00’’). The wall thickness options range from 0.5mm (0.020’’) to 3mm (0.118’’). Additionally, different lengths can be customized per project specifications.

How is the clean inner surface of your capillary tubes guaranteed?

Our capillary tubes are bright annealed and cleaned to ensure the inner surface is completely free from oil, grease, and other loose particles. This meticulous cleaning guarantees an optimized and even flow of liquids and gases for sensitive sensor applications.

What quality testing do you conduct on your control line tubing?

Every batch of tubing undergoes rigorous quality control checks, including non-destructive testing, hydrostatic testing, surface finish inspections, dimensional accuracy checks, flare & coning tests, alongside mechanical and chemical property analyses.

How does temperature affect the working pressure of the tubes?

Working pressure capacities drop as operating temperatures rise. To find the exact limits at higher temperatures (up to 400°F / 204°C), reference working pressure ratings at 100°F (38°C) must be multiplied by the specified ASME adjustment factors for seamless or welded configurations.