Stainless Steel Pipes
Since 1965, founding year of the company, METALLOURGIA MANDRAS S.A. did not stop to invest constantly in the production of new products in order to develop and strengthen its presence in the drilling pipe manufacturing industry.
Coming from a long experience in the field of manufacture of steel drilling pipes, METALLOURGIA MANDRAS S.A specializes now also in the manufacturing of stainless steel drilling pipes.
In stainless steel AISI-SAE 304 (ISO A2), the higher the nickel content, the greater the corrosion resistance.
In stainless steel AISI-SAE 316 (ISO A4) there is even a higher resistance to corrosion, because the molybdenum content is up to 3%.
• Not oxidized
• Resistant to fire and high temperatures
• Healthy
• Charming appearance
• High resistance
• Long value (life)
• 100% recyclable
In Detail:
1) The stainless sheet steel used for blind pipe manufacture is AISI 304 or AISI 316, 3-6mm wall thickness, in single pieces up to six meters. The pipes are measured in accordance with API 5A. Blind pipes are longitudinal HF – EN10296-2 or MIG-EN 10217 welded.
3) The connections of pipes and screens are manufactured under European specifications for stainless steel flat bars. They have semicircular thread with 2 coils/inch and a depth of at least 70 m/m from the edges. Their length is at least 100 m/m to 120 m/m and their thickness from 12m/m up to 15 m/m.
| CHEMICAL ANALYSIS | ||||||||||
| GRADE OF STEEL | AISI (ΗΠΑ) | C % | SI % | Mn % | P % | S % | Cr % | Mo % | Ni % | OTHER ELEMENTS |
| AUSTENITIC | 304 | 0.07 | 1.00 | 2.00 | 0.045 | 0.030 | 16,00 -19,00 | 8,00 - 10,00 | N<0,11 | |
| 316 | 0.07 | 1.00 | 2.00 | 0.045 | 0.030 | 16,00 -18,00 | 2,5 - 3,00 | 11,5 - 14,00 | N<0,11 |
| MECHANICAL FEATURES | |||||||||||||
| TYPE OF STEEL | AISI (USA) | THICKNESS | IMPROVE | ΗΒ ΜΑΧ | STRESS Rp 0,2 N/ mm2 min | STRESS Rp 1,0 N/ mm2 min | TENSILE STRENGTH Rm N/ mm2 | BREAKING ELOGATION Α% min | BREAKING ELOGATION Α% min | CVN (ISO-V) | CVN (ISO-V) | INTERGRANULAR CORROSION | INTERGRANULAR CORROSION |
| STRESS Rp 0,2 N/ mm2 min | STRESS Rp 1,0 N/ mm2 min | TENSILE STRENGTH Rm N/ mm2 | TENSILE | SHEAR | TENSILE | SHEAR | AS | HOT WORK | |||||
| AUSTENITIC | 304 | <160 160<250<250 | ΑΤ | 215 | 190 | 225 | 500-700 | 45 | - | 100 | - | YES | NO |
| AUSTENITIC | - | 35 | - | 60 | |||||||||
| AUSTENITIC | 316 | 215 | 200 | 235 | 500-700 | 40 | - | 100 | - | NO |
S=SULPHUR Cr=CHROME Mo=MOLYBDENUM Ni=NICKEL
Below you can see the dimensions of the products:
| EXTERNAL DIAMETER | WALL THICKNESS | INTERNAL DIAMETER | WEIGHT/METER | SOCKET EXTERNAL DIAMETER OF BOX | SOCKET INTERNAL DIAMETER OF PIN | SOCKET LENGTH | |
| in | mm | mm | mm | kg | mm | mm | mm |
| 4 1/2΄΄ | 114,30 | 3 | 108.30 | 8.30 | 130 | 104 | 100 |
| 4 | 106.30 | 10.90 | |||||
| 5 1/2΄΄ | 139.70 | 3 | 133 | 10.10 | 149 | 123 | 100 |
| 4 | 131 | 13.80 | |||||
| 6 5/8΄΄ | 168,30 | 3 | 162.30 | 12.60 | 185 | 156 | 100 |
| 4 | 160.30 | 16.20 | |||||
| 5 | 158.30 | 20.15 | |||||
| 7 5/8΄΄ | 193,70 | 3 | 187.70 | 14.50 | 210 | 180 | 100 |
| 4 | 185.70 | 18.70 | |||||
| 5 | 183.70 | 23.30 | |||||
| 8 5/8΄΄ | 219,10 | 3 | 213.10 | 16.30 | 240 | 206 | 100 |
| 4 | 211.10 | 21.20 | |||||
| 5 | 209.10 | 26.40 | |||||
| 6 | 207.10 | 31.60 | |||||
| 9 5/8΄΄ | 244,50 | 4 | 236.50 | 24.50 | 264 | 230 | 120 |
| 5 | 234.50 | 30.60 | |||||
| 6 | 232.50 | 36.70 | |||||
| 10 3/4΄΄ | 273 | 4 | 265 | 26.50 | 294 | 258 | 120 |
| 5 | 263 | 34.20 | |||||
| 6 | 261 | 39.50 | |||||
| 12 3/4΄΄ | 323.9 | 4 | 315.9 | 31.60 | 350 | 310 | 120 |
| 5 | 313.9 | 39.40 | |||||
| 6 | 311.9 | 47.00 | |||||
| 14΄΄ | 355.6 | 4 | 347.6 | 34.71 | 370 | 335 | 120 |
| 5 | 345.6 | 38.99 | |||||
| 6 | 343.6 | 51.80 | |||||
| 16΄΄ | 406,40 | 5 | 396.40 | 49.10 | 423 | 384 | 120 |
| 6 | 394.40 | 58.80 | |||||
| 18΄΄ | 457.2 | 5 | 447.20 | 55.00 | 483 | 437 | 120 |
| 6 | 445.20 | 66.00 |
