Meilong Tube
NACE MR0175 316L Stainless Steel Seamless Chemical Injection Line Capillary Tubing
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 |
