Precise and Efficient Seam Annealing. Thermatool In-line Seam Annealing/Normalizing Equipment is designed to effectively Post Weld Heat Treat (PWHT) HF welded tube and pipe across a wide range of product diameters, wall thicknesses and material chemistries. To provide quality control and to ensure process repeatability, Thermatool Seam Annealers are available with SmartAnnealTM closed loop temperature control and real-time temperature monitoring. Powered by VIP™ Series Power Supplies, Thermatool Seam Annealers offer the most comprehensive automation and control package (including recipe recall) available to mill operators today. Our design ensures that electrical efficiency is maximized giving you the most reliable return on your investment! Thermatool Corp. • [email protected] • +1 (203) 468-4100 thermatool.