HCBBS Forum (English)
Submit Chemical Projects / Find Solutions
Amplify Your Requirements on a Broader Chemical Platform *Engineering · Technology · Equipment · Solutions*
Submit Request

【Daily Question】Utilities - Mechanical & Electrical - 20191111

2019-11-11View Original

Thread Content

Which of the following pipes requires preheating before welding, with a preheating temperature of 100–200°C? ( )    A. Low-carbon steel pipes with a wall thickness greater than 36 mm B. Low-alloy steel pipes with a wall thickness greater than 20 mm C. Stainless steel pipes with a wall thickness greater than 10 mm D. Low-carbon steel pipes of grades 10, 15, and 20 with a wall thickness greater than 25 mm. Answer: D

Submit a Project

**Looking for Chemical Technology, Equipment & Solutions?** No Registration Required Broader Platform Exposure | Global Chemical Service Provider Connections

Submit Request — Free Consultation

Disclaimer

This is an automated machine translation of the original thread. Some technical terms may have inaccuracies; the original text shall prevail. Click "View Original" at the top right to access the source page, which supports IP-based automatic real-time language translation. Please watch out for contact details and sales inducements to prevent fraud. All content and translations are for reference only, representing solely the poster's personal views. For enquiries, email service@hcbbs.com.