What Is Tempilstik®? The Complete Field Guide
Tempilstik® is a Made-in-USA temperature indicating crayon that melts precisely at its rated temperature (±1°F). How it works and how to choose.
Read more →Welding & Temperature-Control Technical Blog
Preheat · Interpass · PWHT · Stress Relieving — technical resources for welding engineers and QA/QC in the O&G, EPC and power industries
Tempilstik® Field Usage Guide for Welders & QC
A practical guide for welding engineers and QC inspectors: selecting the right rating and using Tempilstik® correctly on site.
Read more →
Preheat for Carbon Steel Welding — AWS D1.1 & ASME
Why preheat is mandatory for carbon steel, minimum preheat temperatures per AWS D1.1 and ASME B31.3, and how to verify with Tempilstik®.
Read more →
Preheat Temperature Reference Table — AWS D1.1 & ASME B31.3
A quick look-up preheat table for common welding materials: A36, A572, P11, P22, P91, P92 and Duplex 2205.
Read more →
Preheat Quick Reference — AWS D1.1 & ASME B31.3
A condensed preheat temperature reference covering A36, A572, SS400, P11, P22, P91, P92 and Duplex 2205.
Read more →
Preheat Lookup Table by Steel Type
A comprehensive preheat lookup table by steel type across AWS D1.1, ASME B31.3 and API 1104.
Read more →
Preheat Temperature Reference Table — AWS, ASME, API
A complete preheat reference: AWS D1.1 structural steel, ASME B31.3 process piping by P-Number, and API 1104 pipelines.
Read more →
ASME B31.3 Preheat for Process Piping by P-Number
A practical guide to ASME B31.3 preheat by P-Number, a B31.1 vs B31.3 comparison, and a worked A106 Gr.B case study.
Read more →
EN 1011-2 Preheat Standard — CET & Method A Tables
The European preheat standard for steel welding: the CET carbon equivalent formula and Method A preheat tables by thickness.
Read more →
Interpass Temperature in Welding — AWS D1.1 & ASME
What interpass temperature is, how it differs from preheat and PWHT, maximum limits by material, and the two-crayon control method.
Read more →
PWHT — Post Weld Heat Treatment & ASME Requirements
What PWHT is, how it differs from preheat and interpass, ASME stress-relief temperatures by P-Number, and Tempilstik® verification.
Read more →
What Is PWHT? Definition & ASME Requirements
A clear definition of Post Weld Heat Treatment, ASME P-Number temperature requirements, soaking-time rules, and verification.
Read more →
Stress Relieving 190–210°C — Three Levels of PWHT
Distinguishing three levels of stress-relief heat treatment — low 190–210°C, intermediate 300–400°C and full PWHT — with temperature control.
Read more →
P91 Steel Welding — Preheat, Interpass & Mandatory PWHT
Critical temperature control for P91 (9Cr-1Mo-V): minimum preheat 200°C, maximum interpass 300°C, and mandatory PWHT 730–760°C.
Read more →
E7018 Electrode — Preheat & Rod Oven Storage 120–150°C
When preheat is still required for E7018, correct rod-oven storage at 120–150°C, rebaking procedure, and oven verification.
Read more →
Tempilstik® in Power Plant Welding (P91 → PWHT)
How Tempilstik® is used across the welding cycle in thermal power plants: P91 preheat at 200°C, interpass ≤300°C and PWHT.
Read more →
Tempilstik® vs Thermomelt® — Detailed Comparison
Same accuracy, different size and documentation. When NIST-traceable Thermomelt® is required versus when Tempilstik® is the better fit.
Read more →
Tempilstik® vs Laser Pyrometer — Which Is More Accurate?
Accuracy, emissivity effects and cost compared for preheat, interpass and PWHT temperature verification.
Read more →
Tempilstik® vs Infrared Thermometer — Technical Comparison
An emissivity-error table by steel surface condition, a 14-criterion comparison, and guidance on when each tool is appropriate.
Read more →