Free for your class

Checks, lessons and handouts

Send students to these links, or print the PDFs for the classroom.

Embed the free check

Put the free 10-question check on your own page. Copy the code under an exam and paste it into the HTML of your page. Scores open in a new tab on Long Seam, and the code includes a link back to us. Paste both lines; if your site strips scripts, the frame keeps a fixed height.

• API 510 Pressure Vessel Inspector

  Embed code<iframe src="https://longseam.com/api-510/diagnostic?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=check_embed&utm_content=api-510" id="ek-check-api-510" title="Free API 510 practice check" width="100%" height="900" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-check-api-510"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/api-510?utm_source=embed&utm_medium=referral&utm_campaign=check_embed&utm_content=api-510">Free API 510 practice check by Long Seam</a></p>

• API 570 Piping Inspector

  Embed code<iframe src="https://longseam.com/api-570/diagnostic?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=check_embed&utm_content=api-570" id="ek-check-api-570" title="Free API 570 practice check" width="100%" height="900" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-check-api-570"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/api-570?utm_source=embed&utm_medium=referral&utm_campaign=check_embed&utm_content=api-570">Free API 570 practice check by Long Seam</a></p>

• API 510 Six-Year Recertification Web Quiz

  Embed code<iframe src="https://longseam.com/api-510-recert/diagnostic?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=check_embed&utm_content=api-510-recert" id="ek-check-api-510-recert" title="Free API 510 recert practice check" width="100%" height="900" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-check-api-510-recert"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/api-510-recert?utm_source=embed&utm_medium=referral&utm_campaign=check_embed&utm_content=api-510-recert">Free API 510 recert practice check by Long Seam</a></p>

• API 653 Aboveground Storage Tank Inspector

  Embed code<iframe src="https://longseam.com/api-653/diagnostic?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=check_embed&utm_content=api-653" id="ek-check-api-653" title="Free API 653 practice check" width="100%" height="900" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-check-api-653"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/api-653?utm_source=embed&utm_medium=referral&utm_campaign=check_embed&utm_content=api-653">Free API 653 practice check by Long Seam</a></p>

• API 571 Corrosion and Materials

  Embed code<iframe src="https://longseam.com/api-571/diagnostic?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=check_embed&utm_content=api-571" id="ek-check-api-571" title="Free API 571 practice check" width="100%" height="900" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-check-api-571"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/api-571?utm_source=embed&utm_medium=referral&utm_campaign=check_embed&utm_content=api-571">Free API 571 practice check by Long Seam</a></p>

Embed the question of the day

A new practice question appears in the frame each day on its own. Paste both lines; if your site strips scripts, the frame keeps a fixed height. Or add the RSS feed to a Teams or Slack channel or a reader: no email, nothing sent.

• API 510 Pressure Vessel Inspector

  Embed code<iframe src="https://longseam.com/api-510/daily?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=daily_embed&utm_content=daily-api-510" id="ek-daily-api-510" title="API 510 question of the day" width="100%" height="560" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-daily-api-510"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/api-510/daily?utm_source=embed&utm_medium=referral&utm_campaign=daily_embed&utm_content=daily-api-510">API 510 question of the day by Long Seam</a></p>RSS feed URL

• API 570 Piping Inspector

  Embed code<iframe src="https://longseam.com/api-570/daily?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=daily_embed&utm_content=daily-api-570" id="ek-daily-api-570" title="API 570 question of the day" width="100%" height="560" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-daily-api-570"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/api-570/daily?utm_source=embed&utm_medium=referral&utm_campaign=daily_embed&utm_content=daily-api-570">API 570 question of the day by Long Seam</a></p>RSS feed URL

• API 510 Six-Year Recertification Web Quiz

  Embed code<iframe src="https://longseam.com/api-510-recert/daily?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=daily_embed&utm_content=daily-api-510-recert" id="ek-daily-api-510-recert" title="API 510 recert question of the day" width="100%" height="560" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-daily-api-510-recert"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/api-510-recert/daily?utm_source=embed&utm_medium=referral&utm_campaign=daily_embed&utm_content=daily-api-510-recert">API 510 recert question of the day by Long Seam</a></p>RSS feed URL

• API 653 Aboveground Storage Tank Inspector

  Embed code<iframe src="https://longseam.com/api-653/daily?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=daily_embed&utm_content=daily-api-653" id="ek-daily-api-653" title="API 653 question of the day" width="100%" height="560" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-daily-api-653"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/api-653/daily?utm_source=embed&utm_medium=referral&utm_campaign=daily_embed&utm_content=daily-api-653">API 653 question of the day by Long Seam</a></p>RSS feed URL

• API 571 Corrosion and Materials

  Embed code<iframe src="https://longseam.com/api-571/daily?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=daily_embed&utm_content=daily-api-571" id="ek-daily-api-571" title="API 571 question of the day" width="100%" height="560" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-daily-api-571"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/api-571/daily?utm_source=embed&utm_medium=referral&utm_campaign=daily_embed&utm_content=daily-api-571">API 571 question of the day by Long Seam</a></p>RSS feed URL

Embed the flashcards

The free deck for your class page: students flip the cards in place, and a link under the cards opens the free 10-question check in a new tab. Paste both lines; if your site strips scripts, the frame keeps a fixed height.

• API 510 Pressure Vessel Inspector

  Embed code<iframe src="https://longseam.com/api-510/flashcards?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=flashcards_embed&utm_content=flashcards-embed" id="ek-flashcards-api-510" title="Free API 510 flashcards" width="100%" height="640" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-flashcards-api-510"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/api-510/flashcards?utm_source=embed&utm_medium=referral&utm_campaign=flashcards_embed&utm_content=flashcards-embed">Free API 510 flashcards by Long Seam</a></p>

• API 570 Piping Inspector

  Embed code<iframe src="https://longseam.com/api-570/flashcards?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=flashcards_embed&utm_content=flashcards-embed" id="ek-flashcards-api-570" title="Free API 570 flashcards" width="100%" height="640" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-flashcards-api-570"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/api-570/flashcards?utm_source=embed&utm_medium=referral&utm_campaign=flashcards_embed&utm_content=flashcards-embed">Free API 570 flashcards by Long Seam</a></p>

• API 510 Six-Year Recertification Web Quiz

  Embed code<iframe src="https://longseam.com/api-510-recert/flashcards?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=flashcards_embed&utm_content=flashcards-embed" id="ek-flashcards-api-510-recert" title="Free API 510 recert flashcards" width="100%" height="640" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-flashcards-api-510-recert"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/api-510-recert/flashcards?utm_source=embed&utm_medium=referral&utm_campaign=flashcards_embed&utm_content=flashcards-embed">Free API 510 recert flashcards by Long Seam</a></p>

• API 653 Aboveground Storage Tank Inspector

  Embed code<iframe src="https://longseam.com/api-653/flashcards?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=flashcards_embed&utm_content=flashcards-embed" id="ek-flashcards-api-653" title="Free API 653 flashcards" width="100%" height="640" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-flashcards-api-653"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/api-653/flashcards?utm_source=embed&utm_medium=referral&utm_campaign=flashcards_embed&utm_content=flashcards-embed">Free API 653 flashcards by Long Seam</a></p>

• API 571 Corrosion and Materials

  Embed code<iframe src="https://longseam.com/api-571/flashcards?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=flashcards_embed&utm_content=flashcards-embed" id="ek-flashcards-api-571" title="Free API 571 flashcards" width="100%" height="640" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-flashcards-api-571"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/api-571/flashcards?utm_source=embed&utm_medium=referral&utm_campaign=flashcards_embed&utm_content=flashcards-embed">Free API 571 flashcards by Long Seam</a></p>

Testing windows calendar

API application deadlines and testing-window starts for your crew, in one calendar that updates itself. No email, nothing sent. To add it, copy the URL, then in Google Calendar choose Other calendars, From URL; in Outlook choose Add calendar, Subscribe from web; in Apple Calendar choose File, New Calendar Subscription. Or open it in your calendar app.

Tools to embed

Copy the code under a tool and paste it into the HTML of your page. The tool runs inside a frame on your page, and the code includes a link back to us. Or just link to the tool.

• Remaining life and inspection interval calculator, with the method explained

  Open the tool

  Embed code<iframe src="https://longseam.com/tools/remaining-life-calculator?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=remaining-life-calculator" id="ek-tool-remaining-life-calculator" title="Remaining life and inspection interval calculator, with the method explained" width="100%" height="1500" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-tool-remaining-life-calculator"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/tools/remaining-life-calculator?utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=remaining-life-calculator">Remaining life and inspection interval calculator, with the method explained by Long Seam</a></p>

• Inspection interval calculator: API 510 and API 570

  Open the tool

  Embed code<iframe src="https://longseam.com/tools/inspection-interval-calculator?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=inspection-interval-calculator" id="ek-tool-inspection-interval-calculator" title="Inspection interval calculator: API 510 and API 570" width="100%" height="1500" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-tool-inspection-interval-calculator"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/tools/inspection-interval-calculator?utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=inspection-interval-calculator">Inspection interval calculator: API 510 and API 570 by Long Seam</a></p>

• Corrosion rate calculator: short-term and long-term rates

  Open the tool

  Embed code<iframe src="https://longseam.com/tools/corrosion-rate-calculator?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=corrosion-rate-calculator" id="ek-tool-corrosion-rate-calculator" title="Corrosion rate calculator: short-term and long-term rates" width="100%" height="1500" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-tool-corrosion-rate-calculator"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/tools/corrosion-rate-calculator?utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=corrosion-rate-calculator">Corrosion rate calculator: short-term and long-term rates by Long Seam</a></p>

• Static head calculator: liquid pressure between two elevations

  Open the tool

  Embed code<iframe src="https://longseam.com/tools/static-head-calculator?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=static-head-calculator" id="ek-tool-static-head-calculator" title="Static head calculator: liquid pressure between two elevations" width="100%" height="1500" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-tool-static-head-calculator"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/tools/static-head-calculator?utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=static-head-calculator">Static head calculator: liquid pressure between two elevations by Long Seam</a></p>

• MAWP and minimum thickness calculator: shells and 2:1 heads

  Open the tool

  Embed code<iframe src="https://longseam.com/tools/mawp-thickness-calculator?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=mawp-thickness-calculator" id="ek-tool-mawp-thickness-calculator" title="MAWP and minimum thickness calculator: shells and 2:1 heads" width="100%" height="1500" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-tool-mawp-thickness-calculator"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/tools/mawp-thickness-calculator?utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=mawp-thickness-calculator">MAWP and minimum thickness calculator: shells and 2:1 heads by Long Seam</a></p>

• Pipe minimum thickness calculator (B31.3, API 570)

  Open the tool

  Embed code<iframe src="https://longseam.com/tools/pipe-minimum-thickness-calculator?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=pipe-minimum-thickness-calculator" id="ek-tool-pipe-minimum-thickness-calculator" title="Pipe minimum thickness calculator (B31.3, API 570)" width="100%" height="1500" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-tool-pipe-minimum-thickness-calculator"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/tools/pipe-minimum-thickness-calculator?utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=pipe-minimum-thickness-calculator">Pipe minimum thickness calculator (B31.3, API 570) by Long Seam</a></p>

• Piping hydrotest pressure calculator: B31.3 hydrostatic and pneumatic leak test

  Open the tool

  Embed code<iframe src="https://longseam.com/tools/piping-hydrotest-pressure-calculator?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=piping-hydrotest-pressure-calculator" id="ek-tool-piping-hydrotest-pressure-calculator" title="Piping hydrotest pressure calculator: B31.3 hydrostatic and pneumatic leak test" width="100%" height="1500" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-tool-piping-hydrotest-pressure-calculator"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/tools/piping-hydrotest-pressure-calculator?utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=piping-hydrotest-pressure-calculator">Piping hydrotest pressure calculator: B31.3 hydrostatic and pneumatic leak test by Long Seam</a></p>

• Hydrotest pressure calculator: UG-99 and UG-100 test pressure

  Open the tool

  Embed code<iframe src="https://longseam.com/tools/hydrotest-pressure-calculator?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=hydrotest-pressure-calculator" id="ek-tool-hydrotest-pressure-calculator" title="Hydrotest pressure calculator: UG-99 and UG-100 test pressure" width="100%" height="1500" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-tool-hydrotest-pressure-calculator"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/tools/hydrotest-pressure-calculator?utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=hydrotest-pressure-calculator">Hydrotest pressure calculator: UG-99 and UG-100 test pressure by Long Seam</a></p>

• API 510 eligibility checker and exam windows

  Open the tool

  Embed code<iframe src="https://longseam.com/tools/api-510-eligibility-checker?embed=1&utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=api-510-eligibility-checker" id="ek-tool-api-510-eligibility-checker" title="API 510 eligibility checker and exam windows" width="100%" height="1500" loading="lazy" style="border:0"></iframe><script>addEventListener("message",function(e){var f=document.getElementById("ek-tool-api-510-eligibility-checker"),d=e.data,h=d&&+d.height;if(f&&h>0&&e.source===f.contentWindow&&e.origin==="https://longseam.com"&&d.type==="ek-embed-height")f.style.height=Math.min(4000,Math.max(300,h))+"px"})</script> <p><a href="https://longseam.com/tools/api-510-eligibility-checker?utm_source=embed&utm_medium=referral&utm_campaign=tool_embed&utm_content=api-510-eligibility-checker">API 510 eligibility checker and exam windows by Long Seam</a></p>

• API recertification window calculator

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• API 510 damage mechanism quiz

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• API 510 lookup drill: find the section or table on a clock

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• API 510 and 570 study plan: weekly schedule

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• API 510 and 570 exam cost calculator (2026 fees)

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• Thickness survey analyzer: corrosion rate and remaining life across many readings

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