The general chemical and petrochemical industry requires the most diverse product offering of any industry. A diverse mix of sophisticated processes, feedstock, pollutants, and highly toxic media is found in every petrochemical plant. Their installations cover a wide range of applications. They require valves of different types and materials for the system to operate and produce properly. Producing an array of products under an enormous variety of operating conditions. In addition to the safe handling of toxic products, a good corrosion resistance, reliability, and low cost are of great importance. Continuous development and a focus on specific chemical application requirements have created a range of products that are approved by all major petrochemical companies for use in critical installations, such as crackers, furnaces, and plants for LDPE, hydrogen and ethylene.
MstnLand offers a mix of high-quality products and specialty valves, designed to meet different chemical and petrochemical industry requirements. For organic (polymers, olefins, methanol) & inorganic bulk (fertilizers, chlorines and salts plants) and many other applications. We can offer a series of valves for almost all of these plants, including a cryogenic globe valve, a gate valve, a ball valve and bellows seal. MstnLand also offers an extensive range of design features and corrosion-resistant materials. Special materials in our valves include Copper, Titanium, Monel and Hastelloy, which are supplied for corrosive acids, sulphuric acid, ethylene dichloride, aromatic anhydride, and others.
The chemical industry is extremely diverse with more than 60,000 known products. Chemicals are typically split into basic categories including petrochemicals, agrochemicals, specialty chemicals, pharmaceuticals and bio-chemicals, and consumer products. Like all process industries, the chemical industry needs valves designed for safe, efficient and reliable process operation. Valves may not be the most glamorous piece of equipment in a chemical process industries (CPI) facility, but no plant can function without them. In addition, multiple challenges and issues specific to the chemical processing industry affect valves and valve performance. For these reasons, selecting the right valve — one that will stand up to the rigors and demands of the chemical processing industry — is of the utmost importance.
From a functional perspective, the chemical industry has a need for control, emergency shutdown, manual/automated on/off, safety and pressure relief valves. Typical valve types used are gate (multiple variations), globe, check, plug, diaphragm, ball, butterfly, as well as other rotary control valves like segmented ball and eccentric plug valves.
The main valve test criteria for petrochemical include:
API 598 VALVE INSPECTION AND TEST
The most widely used test specification in the world. The standard covers all types of valves (soft & metal seated) in sizes up to 600NB (NPS 24). It also includes leakage rates and testing criteria for metal-seated and resilient seated valves.
API6D PIPELINE VALVES TEST STANDARD
Used for API6D ball valves, plug valves and API6D design pipeline check/gate valves (also now adopted as part of ISO 5208).
ISO 5208 VALVE TEST STANDARD
Incorporates an adoption of API6D test standard. Leakage rate A is specified for soft seated valves and plug valves (zero leakage*). Also includes standards for gate, globe and check valves (EN 122661-).
BS 6755 VALVE TEST STANDARD
Previously used by some European Manufacturers, now superseded by ISO 5208 (EN 12266-1) standard. It includes leakage rates and testing criteria for metal and resilient seated valves.
ASME B16.34 VALVES – FLANGED, THREADED AND WELDING END
The primary valve design standard, it also contains pressure/temperature charts for determining the working pressures of valves to be used in conjunction with other test standards, such as API 598.
ASME PTC 25 PRESSURE RELIEF DEVICES
The main reference document for the testing of pressure relief valves, PTC 25 contains detailed procedures for testing relief valves with air or steam.
API 527 SEAT TIGHTNESS OF PRESSURE RELIEF VALVES
This covers the seat tightness of pressure relief valves. It also includes allowable leakage rates for testing with steam, water and air.
FCI 70-2* CONTROL VALVE SEAT LEAKAGE
This document contains detailed test procedures and leakage rate classes for control valves. The leakage classes are also occasionally referenced by other documents and used as acceptance criteria. Supersedes ANSI B16.104. Class VI is the highest shut off class*.
ISA S75 HYDROSTATIC TESTING OF CONTROL VALVES
This standard provides a procedure for the hydrostatic shell testing of control valves. Seat testing and acceptance criteria are out of the scope of this document and usually are covered by referencing FCI 70-2.
ISO 5208 INDUSTRIAL VALVES, PRESSURE TESTING OF VALVES
ISO’s primary testing standard, this document covers all types of valves and has four levels of allowable closure test leakage rates.
MSS SP70 CAST IRON GATE VALVES, FLANGED AND THREADED ENDS
The primary design standard for cast iron gate valves, it also contains testing procedures and acceptance criteria.
MSS SP71 IRON SWING CHECK VALVES, FLANGED AND THREADED ENDS
The primary design standard for cast iron check valves also contains testing procedures and acceptance criteria.
MSS SP61* HYDROSTATIC TESTING OF STEEL VALVES
Similar to API 598 (in the case of soft seated valves) this document has some minor variations in test holding times and leakage rates. Metal seated valves the leakage can be a little higher than API598.
MSS SP78 CAST IRON PLUG VALVES, FLANGED AND THREADED ENDS
The primary design standard for cast iron plug valves also contains testing procedures and acceptance criteria.
MSS SP80, BRONZE GATE, GLOBE, ANGLE AND CHECK VALVES
The primary design standard for commodity bronze valves also contains testing procedures and acceptance criteria.
MSS SP85, CAST IRON GLOBE & ANGLE VALVES
The primary design standard for cast iron globe valves also contains testing procedures and acceptance criteria.
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