| 01 | NPS 1/8 DN6 | Threaded or socket-weld forged cap | ASTM A105 carbon steel | ASME B16.11 | Class 3000 or 6000, subject to design code | EN 10204 3.1 MTC; dimensional inspection; heat-number traceability | Instrument and small-bore utility piping |
| 02 | NPS 1/4 DN8 | Socket-weld forged cap | ASTM A182 F316L stainless steel | ASME B16.11 | Class 3000 or 6000, subject to design code | 3.1 MTC; PMI; hardness check where specified; visual inspection | Corrosive process and clean utility lines |
| 03 | NPS 3/8 DN10 | Threaded forged cap | ASTM A182 F11 alloy steel | ASME B16.11 | Class rating selected by piping design | 3.1 MTC; chemical analysis; heat treatment records | High-temperature steam service |
| 04 | NPS 1/2 DN15 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Schedule 40 or 80, matched to pipe wall | 3.1 MTC; dimensional report; visual and surface examination | General industrial and water piping |
| 05 | NPS 3/4 DN20 | Butt-weld cap | ASTM A403 WP304L stainless steel | ASME B16.9 | Schedule 10S or 40S, matched to pipe wall | 3.1 MTC; PMI; passivation evidence when specified | Food, pharmaceutical, and low-corrosion process lines |
| 06 | NPS 1 DN25 | Socket-weld forged cap | ASTM A105 carbon steel | ASME B16.11 | Class 3000 or 6000, subject to design code | 3.1 MTC; dimensional inspection; marking verification | Hydraulic, pneumatic, and instrumentation manifolds |
| 07 | NPS 1 1/4 DN32 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Schedule 40 or 80 | 3.1 MTC; UT or MT as required by purchase specification | Plant utility and hydrocarbon piping |
| 08 | NPS 1 1/2 DN40 | Butt-weld cap | ASTM A403 WP316L stainless steel | ASME B16.9 | Schedule 10S or 40S | 3.1 MTC; PMI; intergranular-corrosion test when specified | Chloride-bearing and hygienic process service |
| 09 | NPS 2 DN50 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Schedule 40 or 80 | 3.1 MTC; dimensional inspection; marking and traceability review | Oil, gas, water, and compressed-air systems |
| 10 | NPS 2 1/2 DN65 | Butt-weld cap | ASTM A420 WPL6 low-temperature carbon steel | ASME B16.9 | Schedule 40 or 80 | 3.1 MTC; Charpy impact test; heat-treatment records | Cold-climate and low-temperature hydrocarbon service |
| 11 | NPS 3 DN80 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Schedule 40 or 80 | 3.1 MTC; visual inspection; dimensional and wall-thickness checks | Process and utility headers |
| 12 | NPS 4 DN100 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Schedule 40 or 80 | 3.1 MTC; UT thickness mapping when specified; NDE records | General refinery and power-plant piping |
| 13 | NPS 5 DN125 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Schedule 40 or 80 | 3.1 MTC; dimensional report; weld-end bevel inspection | Water transmission and industrial process lines |
| 14 | NPS 6 DN150 | Butt-weld cap | ASTM A403 WP304L stainless steel | ASME B16.9 | Schedule 10S or 40S | 3.1 MTC; PMI; surface examination; corrosion-control records | Sanitary and moderately corrosive process systems |
| 15 | NPS 8 DN200 | Butt-weld cap | ASTM A403 WP316L stainless steel | ASME B16.9 | Schedule 10S or 40S | 3.1 MTC; PMI; visual and dimensional inspection | Desalination and chloride-containing services |
| 16 | NPS 10 DN250 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Schedule 40 or XS, matched to pipe | 3.1 MTC; UT or radiographic examination where specified | Large process and utility piping |
| 17 | NPS 12 DN300 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Schedule 40 or XS | 3.1 MTC; dimensional report; wall-thickness verification | Pipeline terminals and plant headers |
| 18 | NPS 14 DN350 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Schedule 40 or XS | 3.1 MTC; UT thickness checks; weld-end dimensional inspection | Power, refinery, and water infrastructure |
| 19 | NPS 16 DN400 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Schedule 40 or XS | 3.1 MTC; NDE records; coating or preservation inspection | Large-diameter process and utility pipelines |
| 20 | NPS 18 DN450 | Butt-weld cap | ASTM A420 WPL6 low-temperature steel | ASME B16.9 | Schedule 40 or XS | 3.1 MTC; impact-test results; heat-treatment and NDE records | Arctic, LNG-related, and low-temperature service |
| 21 | NPS 20 DN500 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Schedule 40 or XS | 3.1 MTC; dimensional inspection; ultrasonic wall checks | Transmission and process-piping projects |
| 22 | NPS 22 DN550 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Schedule 40 or heavier as designed | 3.1 MTC; full traceability; NDE plan approved by purchaser | Custom large-diameter plant piping |
| 23 | NPS 24 DN600 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Schedule 40 or heavier as designed | 3.1 MTC; UT mapping; dimensional and ovality inspection | Water, energy, and pipeline infrastructure |
| 24 | NPS 26 DN650 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Project-specific wall thickness | 3.1 MTC; approved inspection and test plan; NDE documentation | Large-diameter pipeline construction |
| 25 | NPS 28 DN700 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Project-specific wall thickness | 3.1 MTC; UT; dimensional survey; material traceability | Water transfer and energy infrastructure |
| 26 | NPS 30 DN750 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Project-specific wall thickness | 3.1 MTC; NDE records; coating and preservation inspection | Cross-country pipeline and terminal systems |
| 27 | NPS 32 DN800 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Project-specific wall thickness | 3.1 MTC; UT wall mapping; dimensional and visual inspection | High-flow water and industrial systems |
| 28 | NPS 34 DN850 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Project-specific wall thickness | 3.1 MTC; purchaser-approved ITP; complete traceability records | Large infrastructure and pipeline projects |
| 29 | NPS 36 DN900 | Butt-weld cap | ASTM A234 WPB carbon steel | ASME B16.9 | Project-specific wall thickness | 3.1 MTC; UT mapping; dimensional report; NDE dossier | Major water, power, and pipeline projects |
| 30 | NPS 2 DN50 | Butt-weld cap for European projects | EN 10253-2 P235GH carbon steel | EN 10253-2 | Wall thickness selected to EN piping design | EN 10204 3.1 certificate; chemical and mechanical test results | European pressure equipment and thermal systems |
| 31 | NPS 4 DN100 | Butt-weld cap for European projects | EN 10253-4 1.4404 stainless steel | EN 10253-4 | Wall thickness matched to EN pipe series | 3.1 certificate; PMI; corrosion-resistance evidence where specified | European chemical and food-processing facilities |
| 32 | NPS 6 DN150 | Butt-weld cap | ASTM A815 UNS S31803 duplex stainless steel | ASME B16.9 | Schedule 10S, 40S, or project-specific wall | 3.1 MTC; PMI; ferrite testing; solution-annealing records | Offshore, seawater, and high-chloride service |
| 33 | NPS 8 DN200 | Butt-weld cap | ASTM B366 UNS N06625 nickel alloy | ASME B16.9 | Project-specific wall thickness | 3.1 MTC; PMI; tensile testing; heat-treatment records | Severe corrosion and high-temperature chemical service |
| 34 | NPS 10 DN250 | Butt-weld cap, light-wall stainless | ASTM A403 WP316L stainless steel | MSS SP-43 or ASME B16.9, as specified | Schedule 5S or 10S where permitted by design | 3.1 MTC; PMI; wall-thickness and weld-end inspection | Low-pressure corrosive and sanitary services |
| 35 | NPS 12 DN300 | Butt-weld cap with sour-service controls | ASTM A234 WPB carbon steel | ASME B16.9 | Wall thickness and hardness controlled by project specification | 3.1 MTC; hardness test; NACE MR0175 / ISO 15156 compliance when applicable | Wet H2S and sour-gas service |
| 36 | NPS 16 DN400 | Butt-weld cap for regulated pressure equipment | ASTM A234 WPB or equivalent EN material | ASME B16.9 or applicable EN standard | Design-code wall thickness; no universal pressure rating | 3.1 MTC; approved ITP; NDE dossier; PED conformity assessment when in scope | Global pressure-equipment and process-plant projects |