NACE MR0175 316L Stainless Steel Seamless Chemical Injection Line
Capillary Tubing
Meilong Tube manufactures high quality seamless and redrawn,
seam-welded and redrawn coiled tubing which are made from
corrosion-resistant austenitic, duplex, super duplex stainless
steel and nickel alloy grades. 100% of products are used as
hydraulic power control lines, chemical injection lines, alloy
tubing in umbilicals and instrumentation tubing for the
exploitation engineering in the upstream oil and gas industry.
Coiled tubing is available in sizes arrange from outer diameter
0.125 inch (3.175 millimeters) to 1 inch (25.4 millimeters). Wall
thickness is up to 0.083 inch (2.108 millimeters). Lengths up to
65600 feet (20,000 meters) are available for cost-effective
umbilical manufacturing. More sizes within the scope can be
customized to be produced and delivered for meeting your special
requirements.
Stainless steel 316L chemical injection line properties
Pierced (seamless) & floating internal plug redrawn tubing.
Supplied in the annealed condition
Continuous length without orbital joint welds
| Alloy | UNS | O.D. | W.T. | Working Pressure | Burst Pressure | Collapse Pressure | Test Pressure |
| inch | inch | inch | psi | psi | psi | psi |
| Stainless 316L | S31603 | 1/8 | 0.125 | 0.028 | 9,931 | 40,922 | 9,525 | 11,600 |
| Stainless 316L | S31603 | 1/8 | 0.125 | 0.035 | 12,640 | 52,042 | 11,056 | 15,225 |
| Stainless 316L | S31603 | 1/4 | 0.250 | 0.035 | 5,939 | 24,474 | 6,621 | 7,250 |
| Stainless 316L | S31603 | 1/4 | 0.250 | 0.049 | 8,572 | 35,322 | 8,632 | 10,150 |
| Stainless 316L | S31603 | 1/4 | 0.250 | 0.065 | 11,694 | 48,166 | 10,562 | 13,775 |
| Stainless 316L | S31603 | 3/8 | 0.375 | 0.035 | 3,818 | 15,731 | 4,659 | 4,350 |
| Stainless 316L | S31603 | 3/8 | 0.375 | 0.049 | 5,483 | 22,575 | 6,222 | 6,525 |
| Stainless 316L | S31603 | 3/8 | 0.375 | 0.065 | 7,517 | 30,951 | 7,865 | 8,700 |
| Stainless 316L | S31603 | 3/8 | 0.375 | 0.083 | 9,808 | 40,372 | 9,551 | 11,600 |
| Stainless 316L | S31603 | 1/2 | 0.500 | 0.049 | 4,003 | 16,480 | 4,835 | 5,075 |
| Stainless 316L | S31603 | 1/2 | 0.500 | 0.065 | 5,461 | 22,512 | 6,206 | 6,525 |
| Stainless 316L | S31603 | 1/2 | 0.500 | 0.083 | 7,133 | 29,364 | 7,648 | 8,700 |
| Stainless 316L | S31603 | 5/8 | 0.625 | 0.049 | 3,144 | 12,955 | 3,957 | 3,625 |
| Stainless 316L | S31603 | 5/8 | 0.625 | 0.065 | 4,285 | 17,630 | 5,105 | 5,075 |
| Stainless 316L | S31603 | 5/8 | 0.625 | 0.083 | 5,472 | 22,513 | 6,519 | 6,525 |
| Stainless 316L | S31603 | 3/4 | 0.750 | 0.049 | 2,619 | 10,791 | 3,296 | 2,900 |
| Stainless 316L | S31603 | 3/4 | 0.750 | 0.065 | 3,570 | 14,686 | 4,283 | 4,350 |
| Stainless 316L | S31603 | 3/4 | 0.750 | 0.083 | 4,558 | 18,753 | 5,431 | 5,800 |
- Theoretical burst pressure based on minimum wall thickness, and
minimum tensile strength
- Theoretical collapse pressure based on minimum wall thickness, and minimum yield strength
- Pressure rating at 100°F (38°C), neutral and static conditions
As more oil and gas extractions move into deeper and harsher waters
where extreme offshore environments demand extreme safety, our work
is to help you use the “right” corrosion resistant material for
coiled umbilical tubing to improve the safety and reliability of
your work. This is the power for driving our innovations and
continuous development.
Suitable for Application Environment
A common resitance to chloride pitting, crevice corrosion, H2S and
CO2, and chloride stress corrosion cracking (SCC).
Dimensional Tolerance for Chemical Injecton Line
| ASTM A269 / ASME SA269, UNS S31603 (316L) |
| Size OD | Tolerance OD | Tolerance WT |
1/8’’≤OD<3/16’’ (3.18≤OD<4.76 mm) 3/16≤OD<1/2’’ (4.76≤OD<12.7 mm) 1/2’’≤OD≤1’’ (12.7≤OD≤25.4 mm) | +0.003’’ (+0.08 mm) / -0 +0.004’’ (+0.10 mm) / -0 +0.005’’ (+0.13 mm) / -0 | ±10% ±10% ±10% |
Meilong Tube Standard
| Size OD | Tolerance OD | Tolerance WT |
1/8’’ ≤OD<3/16’’ (3.18≤OD<4.76 mm) 3/16≤OD<1/2’’ (4.76≤OD<12.7 mm) 1/2’’≤OD≤1’’ (12.7≤OD≤25.4 mm) | +0.003’’ (+0.08 mm) / -0 +0.004’’ (+0.10 mm) / -0 +0.004’’ (+0.10 mm) / -0 | ±10% ±10% ±8% |
Tests for Quality
Eddy current Surface roughness Hydrostatic Dimensional analysis Grain size Rockwell hardness | Yield strength Tensile strength Elongation Hardness Positive material identification (PMI) Corrosion resistance tests |
Packing
Hydraulic control line is level wound coiled on the metal / wooden
drums or spools.
All drums are packed in wooden crates for easy logistic operation.
Injection Diagram
Application
Capillary coiled alloy tubing for chemical injection
Bare and encapsulated hydraulic control line coiled alloy tubing
for subsea safety valves
Velocity strings, work strings, and steel tube umbilicals
Geothermal coiled alloy tubing
Additional Service For Encapsulation
The chemical injection line can be encapsulated with various
polymers according to customers individual requirements, such as
PVDF, FEP, TPV, etc. The encapsulation is for providing additional
resistance to chemicals, wear, and high temperature.
Available section for encapsulation: Round, square, rectangular.
Encapsulation Materials
| Abbreviation | Generic Name | Trade Name | Minimum Installation Temperature of Encapsulation Materials |
| ECTFE | Ethylene Chlorotrifluoroethylene | Halar® | -60°C |
| ETFE | Ethylene Tetrafluoroethylene | Tefzel® | -60°C |
| FEP | Fluorinated Ethylene Propylene | Teflon® FEP | -100°C |
| HDPE | High Density Polyethylene | | -40°C |
| PFA | Perfluoroalkoxy | Teflon® PFA | -100°C |
| PA | Polyamide | Nylon | -40°C |
| PP | Polypropylene | | -10°C |
| PVDF | Polyvinylidene Fluoride | Kynar® | -20°C |
| TPO-PP | Thermoplastic polyolefin | Santoprene® | -20°C |
