China AISI 316 stainless steel capillary tube Suppliers, Quotes

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China AISI 316 stainless steel capillary tube Suppliers, Quotes

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, AISI 316 stainless steel capillary tube stainless steel small tube is widely used in medical treatment, fiber-optic, pen making, electronic welding products, light cable joint, food, vintage, dairy, drink, pharmacy and biochemistry, different length can be provided according to requests.

Capillary tubes with a maximum bore of 0.0158 in., available in a wide range of stainless steels. 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 the customer requirements. Welded and seamless tube products are manufactured. The standard grades are 304, 304L, 316L (UNS S31603), Duplex 2205 (UNS S32205 & S31803), Super Duplex 2507 (UNS S32750), Incoloy 825 (UNS N08825), Inconel 625 (UNS N06625). Other grades of stainless steel in duplex and superduplex and nickel alloy are available on request.

Diameter from 3mm (0.118’’) to 25.4mm (1.00’’) OD. Wall thickness 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.

316 Stainless Steel Chemical Composition

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N
316	min.	–	–	–	–	–	16.0	2.0-3.0	10.0	–
316	max.	0.035	2.0	0.75	0.045	0.030	18.0	2.0-3.0	14.0	–

Stainless Steel 316 Mechanical Properties

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Rockwell B (HR B) max	Brinell (HB) max
316	515	205	40	95	217

Stainless Steel 316 Physical Properties

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (m/m/0C)			Thermal Conductivity (W/m.K)		Specific Heat 0-1000C (J/kg.K)	Electrical Resistivity (n.m)
Grade	Density (kg/m3)	Elastic Modulus (GPa)	0-1000C	0-3150C	0-5380C	at 1000C	at 5000C	Specific Heat 0-1000C (J/kg.K)	Electrical Resistivity (n.m)
316	7750	200	15.9	16.2	17.0	14.2	18.7	500	720

Stainless Steel 316 Equivalent

Equivalent Grades for 316 Stainless Steel

STANDARD	WERKSTOFF NR.	UNS	JIS	BS	GOST	AFNOR	EN
SS 316	1.4401 / 1.4436	S31600	SUS 316	316S31 / 316S33	–	Z7CND17‐11‐02	X5CrNiMo17-12-2 / X3CrNiMo17-13-3

Specification

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/T 12771-2002
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 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 AISI 316 stainless steel capillary tube 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)¹

Please refer to 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 grade/temperature combination, multiply Pw by adjustment factor.

Grade	100°F	200°F	300°F	400°F
Grade	(38°C)	(93°C)	(149°C)	(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 grade/temperature combination, multiply Pb by adjustment factor.

Grade	100°F	200°F	300°F	400°F
Grade	(38°C)	(93°C)	(149°C)	(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.

▼ Stainless steel coiled tubing /coiled tubes size:

Coiled Tubing Specifications

Coiled Tube Dimensional Details

Our Production line

Manufacturing Facility

Production Process

Industrial Pipe Factory

Quality advantage:

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

1. Non-destructive tests

2. Hydrostatic tests

3. Surface finish controls

4. Dimensional accuracy measurements

5. Flare and coning tests

6. Mechanical and chemical property testing

Application capillary tube

1) Medical device industry

2) Temperature-guided industrial temperature control, sensors used pipe, tube thermometer

3) Pens care industry core tube

4) Micro-tube antenna, various types of small precision stainless steel antenna

5) With a variety of electronic small-diameter Stainless steel capillary

6) Jewelry needle punch

7) Watches, picture

8) Car antenna tube, bar antennas using tubes, antenna tube

9) Laser engraving equipment to use stainless steel tube

10) Fishing gear, accessories, Yugan out with possession of

11) Diet with stainless steel capillary

12) All types of mobile phone stylus a computer stylus

13) Heating pipe industry, oil industry

14) Printers, silent box needle

15) Pull a double-melt stainless steel tube used in window-coupled

16) A variety of industrial small diameter Precision stainless steel tubes

17) Precision dispensing with stainless steel needles

18) Microphone, headphones and microphone to use stainless steel tube, and so on

Tubing Protective Packaging

Final Product Quality Control

Frequently Asked Questions

What are the main applications for stainless steel capillary tubes?

Stainless steel capillary tubes are widely used in medical devices, temperature control sensors, watch making, precision electronics, printing equipment, and core components in fiber-optic communications.

What size ranges are available for stainless steel coiled tubing?

Our coiled tubing ranges from 3mm (0.118’’) to 25.4mm (1.00’’) in outer diameter (OD), with wall thickness options starting from 0.5mm (0.020’’) up to 3mm (0.118’’).

Which steel grades do you manufacture for coiled tubes?

We manufacture tubes in various grades, including standard 304, 304L, 316L, 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.

How is the quality of the control lines assured?

Quality is assured through extensive in-process and finished testing, including non-destructive testing, hydrostatic testing, surface finish audits, strict dimensional tolerance monitoring, flare/coning tests, and full chemical/mechanical verification.

Why are tight tolerances important for capillary tubes?

Tight tolerances, combined with inside surfaces completely free from oil, grease, and particulate matter, guarantee an optimized and consistent flow of gases or liquids from sensors to measuring instruments.