Welcome to DTC Industrial– Professional Manufacturer & Global Suppliersales@dtcflowtech.com
Welcome to DTC Industrial– Professional Manufacturer & Global Suppliersales@dtcflowtech.com
A practical guide to choosing ringlock scaffolding: main components, fixed vs mobile configuration, steel vs aluminum, load requirements and RFQ preparation.
1. The Grooved Concept Instead of welding or threading, a groove is rolled or cut into the end of the pipe. A Grooved Coupling (containing a C-shaped gasket) is then bolted over the two pipe ends to create a seal. 2. Rigid vs. Flexible Couplings Rigid Couplings: Create a joint that behaves like a we …
1. What is a Mill Test Certificate (MTC) 3.1? Governed by EN 10204, a 3.1 certificate is a document issued by the manufacturer (independent of the production department) certifying that the products comply with the order requirements. 2. Essential Data Points Chemical Composition: Heat analysis of C …
1. The Spiral Wound Gasket (SWG) The most common gasket for high-pressure flanges (ASME B16.20). It consists of a V-shaped metallic strip spirally wound with a soft filler (typically Graphite or PTFE). Inner Ring: Prevents “buckling” of the windings into the pipe. Outer Ring: Centers the …
1. What is “Duplex”? Duplex stainless steels have a two-phase microstructure consisting of grains of both Austenitic and Ferritic stainless steel (roughly 50/50). This unique combination provides the best of both worlds: the corrosion resistance of 300-series stainless and the high yield …
Beyond standard flanges: how spectacle blinds, spacers and orifice flanges handle flow measurement and isolation, and the ASME standards that govern them.
1. The Scope of Large Diameters While ASME B16.5 covers flanges up to 24″, ASME B16.47 takes over for sizes from 26″ to 60″. 2. Two Different Philosophies Series A (MSS SP-44): Thicker, heavier, and features larger bolts. It is designed to handle higher external loads. Series B (AP …
1. Raised Face (RF) – The Workhorse The most common facing type. It features a small area (usually 1/16″ or 1/4″ high) raised above the bolting circle. This concentrates more pressure on the gasket, ensuring a reliable seal for standard Class 150-600 applications. 2. Ring Type Join …
1. FBE (Fusion Bonded Epoxy) A single-layer, thermoset polymer coating. It is applied as a dry powder that melts and cures onto a heated pipe. FBE provides excellent adhesion and resistance to cathodic disbondment but is susceptible to mechanical damage during transport. 2. 3LPE (3-Layer Polyethylen …
1. The 300 Series Baseline Stainless steel is defined by its Chromium content, which forms a protective “passive layer.” Grade 304/304L: The most common “18/8” stainless steel. It offers excellent corrosion resistance in fresh water and mild atmospheric conditions. Grade 316/ …
A105 and A350 LF2 look similar on paper but differ in low-temperature impact testing. Compare the chemistry, Charpy requirements and applications of each grade.
Valve fundamentals for buyers: how to separate isolation duty (gate, ball) from throttling duty (globe, butterfly) and the API 6D, API 598, B16.34 standards.
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