Specification of Lined Pipes and Fittings |
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1. Range |
| 1.1 | This specification is applicable for PTFE lined pipes and fittings used for transmitting corrosive fluid. The content includes construction materials, size and test procedure of standards. | | 1.2 | The content includes national standard 10KG level, ANSI150LBS and JIS10K specification etc. |
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2. Material Structure |
| 2.1 | PTFE properties | | 2.1.1 | Temperature limitation
Continuous operating temperature 260ºC
Melting point 327ºC | | 2.1.2 | Chemical resistance Resist most of chemicals. For detail information, please consult our sales engineer. | | 2.1.3 | Frictional coefficient
Static friction coefficient 0.10
Dynamic friction coefficient 0.05 | | 2.1.4 | Proportion ASTM D792 2.14 ~ 2.2 | | 2.1.5 | Tensile strength ASTM D638 280 ~ 350Kg/cm² | | 2.1.6 | Anti-adhesive
Surface tension 18.5dyne/cm
Contact angle
Water 104°~ 111°
Hexadecane 37°~ 45° | | 2.1.7 | Elongation ASTM D638 100-300% | | 2.1.8 | Water absorption ASTM D570 <0.01% | | | | | 2.2 | PTFE liner | | 2.2.1 | Sizes of this type of PTFE lined pipes, flanges and fittings are from 1/2″ to 12″ | | | | | 2.3 | Iron parts | | 2.3.1 | Pipes and fittings | | | Pipes and fittings are made of welded or seamless steel pipes of iron parts. And the thickness is decided by international standards and customers' requirements. | | 2.3.2 | Flange | | | Flanges are made according to any specification of international standard or ANSI150LBS or JIS10K. |
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3. Design Requirements |
| 3.1 | Size | | 3.1.1 | Standard thickness of PTFE lined pipes Unit: mm | | | | Size | 1″ | 1-1/2″ | 2″ | 3″ | 4″ | 6″ | 8″ | 10″ | 12″ | | Standard pipe | 3.0 | 3.0 | 3.0 | 3.0 | 3.5 | 4.5 | 4.5 | 5.0 | 5.0 | | Thickness | 4.0 | 4.0 | 4.0 | 5.0 | 5.5 | 6.5 | 8.5 | 9.0 | 10.0 |
| | | Note: for thickness of other PTFE lined pipes different from above and PFA lined pipes below 4″, please refer to our sales engineer. | | 3.1.2 | Thickness of PTFE lined pipes | | | | Size | 1/2″~ 4″ | Thickness of liner | 3mm | | | 6″~ 8″ | | 4mm | | | 10″~ 12″ | | 5mm |
| | 3.1.3 | Specification of size of lined flaring Unit: mm | | | | Fitting Size | 15 | 20 | 25 | 40 | 50 | 65 | 80 | 100 | 150 | 200 | 250 | 300 | | 1/2″ | 3/4″ | 1″ | 1-1/2″ | 2″ | 2-1/2″ | 3″ | 4″ | 6 | 8″ | 10″ | 12″ | | Flaring Diameter | 32 | 40 | 48 | 68 | 87 | 100 | 117 | 151 | 203 | 256 | 311 | 365 |
| | | | | 3.2 | Vent holes | | | Every pipe or fitting is equipped with vent holes to release gas between liners and iron parts. Each pipe shall at least have two vent holes of 0.12″(3mm) in diameter, located at flange faces of two ends, 2″(50mm) ; each fitting shall also at least have two vent holes; and reducing flange does not have any vent hole. |
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4. Detection requirements |
| 4.1 | Hydraulic test Interior | | | pressure test will be operated at 150% of maximum work pressure. Total pressure can be reached within one minute and kept for 3 minutes. | | | | | 4.2 | Pinhole test | | | The test shall be performed with high voltage equipment (10,000 V) that shall not be destructive. After the current is connected, if any spark is produced from the probe or any pinhole warming sound is made by the detector, it means there is defect in the liner and thereby this part shall not pass quality inspection. | | | | | 4.3 | Visual inspection and appearance paint brush | | | The surface shall not have any bubble, pinhole or other defects. All defects shall be fixed before shipment. After visual inspection, an epoxy resin base coat shall be coated outside the pipes and fittings. |
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5. Storage, transportation and confirmation |
| Use wooden plate to protect lining face of flanges at each end. Therefore products will not be damaged during normal transportation. 6. Pipe fittings A value specification |
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6. Pipe fittings A value specification |
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| Name | Specification | A value of 90
degrees elbow | A value of 45 degrees elbow | A value of three-way | A value of four-way | A value of reducing joint | | PTFE pipe | DN10 | 70 | 45 | 70 | 70 | | | PTFE pipe | DN15 | 80 | 56 | 80 | 80 | | | PTFE pipe | DN20 | 85 | 60 | 85 | 85 | | | PTFE pipe | DN25 | 90 | 62 | 90 | 90 | | | PTFE pipe | DN32 | 100 | 64 | 100 | 100 | | | PTFE pipe | DN40 | 115 | 64 | 115 | 115 | | | PTFE pipe | DN50 | 120 | 68 | 120 | 120 | 100 | | PTFE pipe | DN65 | 130 | 72 | 130 | 130 | 100 | | PTFE pipe | DN80 | 140 | 78 | 140 | 140 | 100 | | PTFE pipe | DN100 | 150 | 98 | 150 | 150 | 100 | | PTFE pipe | DN125 | 180 | 108 | 180 | 180 | 150 | | PTFE pipe | DN150 | 195 | 118 | 195 | 195 | 150 | | PTFE pipe | DN200 | 220 | 158 | 200 | 200 | 200 | | PTFE pipe | DN250 | 257 | 195 | 235 | 235 | 250 | | PTFE pipe | DN300 | 285 | 226 | 260 | 260 | 300 |
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Complaint
