Field evidence

Every sequence begins with what the site actually showed.

These records are selected, privacy-protected views of real field work and controlled demonstrations. They preserve evidence and functional progression without disclosing reproducible construction parameters. A case record supports reasoning about that case; it does not establish a general rating or certification.

Case 01

Styrene monomer service line

3-inch steel line · reported 0.6 MPa · reported minimum wall 0.3 mm from an original 5.49 mm

94.5%reported wall loss

Severely corroded industrial pipe before ISB construction — 01 · Initial severe corrosion

The public sequence preserves the relationship between the initial condition, construction start, mechanical reinforcement supporting the leak-control sealing design, ISB gripping/compression construction and completion.

Controlled starting segments on a corroded industrial pipe — 02 · Construction start

Mechanical reinforcement constructed as part of the leak-control sealing design — 03 · Mechanical reinforcement for leak-control sealing

Dedicated winding device constructing ISB compression function — 04 · Gripping / compression function

Completed red ISB through a vertical pipe and lower bend — 05 · Completed ISB

Case 02

400 mm PE pipe / 100 mm opening

Controlled leak-control sealing demonstration · pressure basis 0.4 MPa

3.14 kNpressure-area force

F = π × (0.10 m)² ÷ 4 × 0.4 MPa ≈ 3.14 kN

400 mm PE test pipe mounted on a support frame — 01 · Pipe and test configuration

100 mm opening measured with a steel ruler — 02 · 100 mm opening evidence

Completed red ISB around the 100 mm opening region — 03 · Completed leak-control sealing ISB

The completed body is the end of this case sequence. The later cutting demonstration belongs to the High-Resilience explanation.

Case 03

Natural gas line · corrosion under insulation

Buried geometry · constrained access · audible pre-construction leak

DN100reported steel pipe

Original field audio

The short opening video retains the sound of the leak.

Only the minimum segment needed to establish the existing condition is shown. Inspection and armor-protection stages are represented by still evidence.

Buried insulated natural gas pipe in an excavated constrained area — 01 · Existing condition

Post-construction field inspection of ISB — 02 · Post-ISB inspection

Completed armored protection over the ISB — 03 · Armor protection completed

Case 04

Natural gas supply station reducer connection

Leak-detection liquid showed bubbles · location constrained construction access

4 stagescondition to protection

01 · Bubble-test leak evidence

Orange ISB formed over the reducer connection — 02 · ISB constructed

Final inspection of ISB at a gas supply station — 03 · Final inspection

Armored protection installed over the completed ISB — 04 · Armor protection

Case 05

High-temperature 2EH line · reported weld leak

Insulated Ø100 mm process line · 0.4 MPa reported · 170°C operating, with occasional peaks to 200°C

170°Creported operating temperature

A de-identified 2017 field record describes a leak at a weld on a process line carrying 2-ethylhexanol (2EH). For this case, the written procedure required the line to be shut down and cooled before hands-on ISB construction.

Insulation opened around an industrial process-line weld — 01 · Insulation opened and weld region exposed

Close view of the reported leak area at an exposed process-line weld — 02 · Reported weld-leak area

Red site-formed ISB under construction around the process-line weld — 03 · ISB construction state

Dark external protection around the configured body at the process-line weld — 04 · Documented outer-protection state

The source record documents the construction sequence only; it does not report restart conditions, acceptance-test results or verified service duration.

Case 06

Oilfield gathering-station crude-oil line

Reported DN100 steel pipe · perforation leak · prior clamp and plastic pad re-leaked quickly

10 barreported pressure

Dark liquid leaking from a prior clamp and plastic-pad arrangement on a vertical steel pipe — 01 · Active leakage at the prior clamp and pad

Wider existing-condition view of the prior metal clamp on the DN100 oilfield line — 02 · Prior clamp arrangement · wider view

Red site-formed ISB under construction around a DN100 oilfield steel pipe — 03 · ISB construction state

This sequence records the reported temporary-clamp failure, the existing clamp arrangement and an ISB construction state. No completed-state photograph, acceptance-test result or verified service duration is supplied here, and the case does not establish a universal 10-bar rating.

Case 07

LNG-service piping · reported welded-branch leak

Rapid warm-to-cryogenic cycling · approximately 10–50°C warm-state conditions · reported cryogenic phase near −173°C

near −173°Creported cryogenic phase

The leak was reported at a branch-to-header weld. Differential thermal response at the welded geometry was part of the engineering consideration; the photographs record this field sequence but do not establish root cause.

01 · Field contextLocalized frosting in LNG service
Frost was visible around the operating pipework during the reported cryogenic phase.
02 · Existing conditionReported leak at a welded branch
An edited field image identifies the reported leak location at the branch-to-header weld.
03 · ISB construction stateBodies formed around the geometry
Case-specific ISBs were constructed around two welded branch connections before external protection.
04 · Low-temperature stateObserved during cryogenic operation
Frosting records this case condition; it is not a temperature measurement or universal rating.
05 · External protectionFiber-reinforced outer protection
An external protective layer was applied for this particular field configuration.

The reported temperatures describe this case and its transitions. They are not a universal, continuous-service or long-term −173°C rating. LNG-service context does not by itself prove direct ISB exposure to bulk-LNG temperature. Suitability remains case-specific.

Your field condition

A prior case may reveal a question. It cannot replace your site evidence.

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