{"id":21863,"date":"2026-01-05T14:03:42","date_gmt":"2026-01-05T10:33:42","guid":{"rendered":"https:\/\/www.kianpetroleum.com\/en\/?p=21863"},"modified":"2026-01-05T15:08:07","modified_gmt":"2026-01-05T11:38:07","slug":"lpg-gas-analysis-of-south-pars-petrochemical-en","status":"publish","type":"post","link":"https:\/\/www.kianpetroleum.com\/en\/lpg-gas-analysis-of-south-pars-petrochemical-en\/","title":{"rendered":"Lpg Gas Analysis of South Pars Petrochemical Asaluyeh"},"content":{"rendered":"\t\t
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Lpg Gas Analysis of South Pars Petrochemical Asaluyeh<\/figcaption><\/figure>

Liquefied Petroleum Gas (LPG) is one of the important gas products that consists of a mixture of propane and butane in varying ratios. The proportion of these two components in LPG varies depending on customer requirements and climatic conditions; for example, in cold regions, the percentage of propane is higher, while in warm regions, the percentage of butane increases.<\/p>

The South Pars Gas Complex consists of 13 active refineries, among which refineries No. 3 and 5 are responsible for the production and blending of propane and butane. These refineries receive feedstock from phases 4, 5, 9, and 10 of the South Pars gas field and produce high-purity propane and butane, which are then blended in appropriate ratios based on market demands and environmental conditions.<\/p>

In the following, we will take a closer look at the LPG analysis of South Pars Petrochemical (Assaluyeh). In this analysis, the technical specifications of propane and butane are presented separately, and we will proceed to evaluate and interpret each of these components in detail.<\/p>

Analysis of LPG Gas from South Pars Petrochemical Complex (Assaluyeh)<\/h2>

As mentioned earlier, in this analysis sheet, the specifications of propane and butane are presented separately. Accordingly, we will also analyze the characteristics of these two components separately:<\/p>

Butane Specifications<\/h3>

Purity Percentage<\/h4>

According to the analysis sheet provided by South Pars Petrochemical Complex (Assaluyeh), the purity percentage of butane (Butane Content) has been measured using the ASTM D2163 test method, and its minimum value is specified as 95 percent. This level of purity indicates that the butane produced in this complex has very high purity, as a maximum of 5 percent impurities (such as heavier hydrocarbons or other substances) may be present, which is standard and acceptable for industrial and commercial applications.<\/p>

Vapor Pressure<\/h4>

In the LPG gas analysis sheet of South Pars Petrochemical Complex (Assaluyeh), the Vapor Pressure of butane at a temperature of 100\u00b0F is measured using the ASTM D1267 or D2598 test methods, and the maximum standard value is specified as 70 Psig. This parameter is of great importance because vapor pressure indicates the volatility of butane and its behavior under different temperature conditions. Excessively high vapor pressure can lead to increased pressure in storage tanks or cylinders in hot climates, posing risks such as leakage or explosion, while very low vapor pressure may prevent proper evaporation of the gas in cold temperatures and impair its performance for industrial or domestic use. This standard ensures that the produced butane is safe and suitable for use.<\/p>

Corrosion Copper Strip<\/h4>

In the LPG gas analysis sheet of South Pars Petrochemical Complex (Assaluyeh), the “Corrosion Copper Strip” parameter for butane is measured using the ASTM D1838 test method. This test is conducted to check for the presence of corrosive compounds, especially sulfur compounds such as hydrogen sulfide, in the butane. The value “No. 1 Strip” in the analysis sheet indicates the lowest possible level of corrosion, meaning the butane contains almost no corrosive compounds and is safe for use in systems that come into contact with copper or its alloys, such as pipelines and industrial equipment.<\/p>

Sulfur and Hydrogen Sulfide Content<\/h4>

The amount of sulfur present in the butane produced by South Pars Petrochemical Complex is very low, and this product is practically free of the corrosive and hazardous gas hydrogen sulfide (H\u2082S). The absence of this harmful compound indicates the precise and well-controlled gas processing in the refining stages. Hydrogen sulfide, in addition to causing severe corrosion in metal equipment, is considered a serious threat to human health and, in high concentrations, can lead to poisoning, respiratory damage, and even death. Moreover, this gas has destructive environmental impacts on water, soil, and air. Therefore, the high purity of the butane produced in this complex not only means reduced maintenance costs and increased equipment lifespan, but also reflects excellent quality, high safety, and compliance with environmental standards.<\/p>

Propane Specifications<\/h3>

Purity Percentage<\/em><\/h4>

According to the analysis sheet, the minimum purity of propane must be 96 percent, which indicates the high quality and purity of the produced product. Up to 4 percent of this product may include impurities such as ethane. This reflects the use of advanced technologies in the separation and distillation units of the complex’s refineries, which play an important role in producing a product with stable, safe characteristics that meet the diverse needs of consumers.<\/p>

Vapour Pressure<\/em><\/h4>

The maximum standard vapor pressure of propane at 100\u00b0F can be 200 Psig. The reason for the higher allowable vapor pressure of propane (200 Psig) compared to butane (70 Psig) at 100\u00b0F relates to the molecular structure of these two components. Propane has a lighter and smaller molecule, so it evaporates more easily, which leads to a higher vapor pressure.<\/p>

Residual Matter: Oil Stain Observation<\/em><\/h4>

In the LPG gas analysis sheet of South Pars Petrochemical Complex (Assaluyeh), the parameter “Residual Matter: Oil Stain Observation” for propane has been evaluated, and the result must be “Pass”. This parameter is of great importance, as the presence of oily impurities can lead to residue buildup in propane-consuming systems (such as burners or engines), reduce efficiency, and even damage the equipment. A “Pass” result indicates that the produced propane is high in purity and free from non-volatile substances, making it suitable for safe and efficient use.<\/p>

Copper Strip Corrosion Test<\/em><\/h4>

As mentioned earlier, the Copper Strip Corrosion Test is one of the common methods for assessing the presence of corrosive compounds, especially hydrogen sulfide (H\u2082S), in petroleum and gas products such as LPG. In the analysis sheet related to the LPG produced by South Pars Gas Complex, the result “No. 1 Strip” is indicated for the copper strip corrosion test. This number shows that the copper strip has not undergone any noticeable discoloration, and consequently, it can be concluded that the produced product is almost free of corrosive compounds such as sulfides.<\/p>

Sulfur and Hydrogen Sulfide Content<\/em><\/h4>

The sulfur content in the propane produced by South Pars Petrochemical Complex, similar to its butane, is very low. Furthermore, in the analysis sheet related to this product, the amount of hydrogen sulfide (H\u2082S) is listed as “Negative”, which clearly indicates the absence of this corrosive and highly dangerous compound in the final product.<\/p>

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Liquefied Petroleum Gas (LPG) is one of the important gas products that consists of a mixture of propane and butane in varying ratios. The proportion of these two components in LPG varies depending on customer requirements and climatic conditions; for example, in cold regions, the percentage of propane is higher, while in warm regions, the […]<\/p>\n","protected":false},"author":8,"featured_media":21864,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[597],"tags":[594],"class_list":["post-21863","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-analysis-of-petrochemical-and-refinery-products","tag-lpg-gas-analysis"],"_links":{"self":[{"href":"https:\/\/www.kianpetroleum.com\/en\/wp-json\/wp\/v2\/posts\/21863","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kianpetroleum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kianpetroleum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kianpetroleum.com\/en\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kianpetroleum.com\/en\/wp-json\/wp\/v2\/comments?post=21863"}],"version-history":[{"count":4,"href":"https:\/\/www.kianpetroleum.com\/en\/wp-json\/wp\/v2\/posts\/21863\/revisions"}],"predecessor-version":[{"id":21873,"href":"https:\/\/www.kianpetroleum.com\/en\/wp-json\/wp\/v2\/posts\/21863\/revisions\/21873"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kianpetroleum.com\/en\/wp-json\/wp\/v2\/media\/21864"}],"wp:attachment":[{"href":"https:\/\/www.kianpetroleum.com\/en\/wp-json\/wp\/v2\/media?parent=21863"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kianpetroleum.com\/en\/wp-json\/wp\/v2\/categories?post=21863"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kianpetroleum.com\/en\/wp-json\/wp\/v2\/tags?post=21863"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}