Restraint articles
Longer reads for operators, company men and HSE managers: the rules, the numbers and what a crew actually does on location.
Restraint articles
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Restraint 6 min readLine of Fire Hazards Around Pressurized Lines and Iron: Red Zones, Stored Energy and Restraint
Most line-of-fire training talks about swinging loads and pinch points. On a frac or workover location, the line of fire also runs along every pressurized hose and joint of iron. Here's how to set up the red zone and control the energy.
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Restraint 6 min readHammer union mismatch: why a 1502 and a 602 look alike and then fail
A 2-inch Figure 1502 wing nut will thread onto a 602 or 1002 half, feel tight and hold for a while, then blow apart. Here is how to read figure numbers and stop mismatches before pressure-up.
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Restraint 7 min readWhip checks: what they do, how to size them, and where they fall short
A whip check keeps a parted air hose from flailing. Here is what the federal rules actually say, how to size one, how to inspect it, and why it is the wrong tool for high-pressure fluid lines and frac iron.
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Restraint 5 min readFrac Iron Safety: What API 16FI Means for Crews, Inspection and Restraint
API published its first frac iron standard in January 2026. Here's what it covers, the failures it's aimed at, how to manage iron from receiving to retirement, and where restraint fits when a connection still lets go.
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